Re: [mapserver-users] PHP mapscript - browser showing blank page
Hi pietro, As you suggested me, i checked the error_log file , there is no such error related to php. Actually in my case, its projecting the imagecolor 256 255 255 , the faded green color with the respective width and height in the browser, but it not showing up the map layers . its stumbling. what could be a problem? can you probe this problem? thanks. kapilmanoj Pietro Giannini wrote: Hi Kapilmanoj, 1) maybe it is an error on IMAGECOLOR 256 255 255 the first integer must be = 255. if not: 2) try to intercept mapserver errors calling the map image in cgi mode: http://localhost/cgi-bin/mapserv?map=/path/to/kerala.mapmode=maplayer=keralalayer=modis_jpllayer=... if it works, 3) see the php_errors log file (set in php.ini, error_log directive). bye .pg kmanoj-pg7 kmanoj-pg7 ha scritto: Dear users, I am using mapserver 5.0.3 , php 5.2.5 version on fedora 9. I am trying to work out the examples given in the mapserver site, but i am getting the blank page when i call the link through browser http://localhost/mapfiles/sampletest/htdocs/kerala.php Mapscript is working fine without making any problem, but when i trying to import mapfile in PHP and cascade it through the mapserver, it rendering blank page in the browser. i think it could be a problem of extent. Herewith i am attaching my mapfile and php file for your kind perusal can anyone please puzzled out this problem. suggestion will be appreciated. Thanks, kapilmanoj ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users -- Pietro Giannini Bytewise srl - Area GIS 41°50'38.58N 12°29'13.39E ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users -- View this message in context: http://n2.nabble.com/PHP-mapscript---browser-showing-blank-page-tp2408448p2414557.html Sent from the Mapserver - User mailing list archive at Nabble.com. ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] PHP mapscript - browser showing blank page
Kapilmanoj, check the extent of your data sources. Maybe you set wrong extent in map file, so the layers are visible but no data overlays the defined window. bye ...pg kapilmanoj ha scritto: Hi pietro, As you suggested me, i checked the error_log file , there is no such error related to php. Actually in my case, its projecting the imagecolor 256 255 255 , the faded green color with the respective width and height in the browser, but it not showing up the map layers . its stumbling. what could be a problem? can you probe this problem? thanks. kapilmanoj Pietro Giannini wrote: Hi Kapilmanoj, 1) maybe it is an error on IMAGECOLOR 256 255 255 the first integer must be = 255. if not: 2) try to intercept mapserver errors calling the map image in cgi mode: http://localhost/cgi-bin/mapserv?map=/path/to/kerala.mapmode=maplayer=keralalayer=modis_jpllayer=... if it works, 3) see the php_errors log file (set in php.ini, error_log directive). bye .pg kmanoj-pg7 kmanoj-pg7 ha scritto: Dear users, I am using mapserver 5.0.3 , php 5.2.5 version on fedora 9. I am trying to work out the examples given in the mapserver site, but i am getting the blank page when i call the link through browser http://localhost/mapfiles/sampletest/htdocs/kerala.php Mapscript is working fine without making any problem, but when i trying to import mapfile in PHP and cascade it through the mapserver, it rendering blank page in the browser. i think it could be a problem of extent. Herewith i am attaching my mapfile and php file for your kind perusal can anyone please puzzled out this problem. suggestion will be appreciated. Thanks, kapilmanoj ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users -- Pietro Giannini Bytewise srl - Area GIS 41°50'38.58N 12°29'13.39E ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users -- Pietro Giannini Bytewise srl - Area GIS 41°50'38.58N 12°29'13.39E ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
[mapserver-users] Mapserver WMS seem not to read +towgs84 parameters
Hi, I am using Mapserver version 5.2.0 from MS4W delivery through WMS 1.1.1. and I was now trying to add the missing +towgs84 parameters for the Finnish epsg:2393 projection. I located the epsg file from MS4W\proj\nad directory and edited it from this: # KKJ / Finland Uniform Coordinate System 2393 +proj=tmerc +lat_0=0 +lon_0=27 +k=1 +x_0=350 +y_0=0 +ellps=intl +units=m +no_defs to this: # KKJ / Finland Uniform Coordinate System 2393 +proj=tmerc +lat_0=0 +lon_0=27 +k=1 +x_0=350 +y_0=0 +ellps=intl +towgs84=-96.0617,-82.4278,-121.743,4.80107,0.34543,-1.37646,1.4964 +units=m +no_defs However, adding +towgs84 parameters do not have any effect on the Mapserver output. I am sure that this certain epsg file is read, because commenting out the 2393 line makes Mapserver to stop working with my mapfile. In addition, I can make map to shift by editing +x_0 and +y_0 parameters. I had even another try by skipping the whole epsg file by giving the projection directly in the layer definitions of my mapfile as PROJECTION proj=tmerc lat_0=0 lon_0=27 k=1 x_0=350 y_0=0 ellps=intl towgs84=-96.0617,-82.4278,-121.743,4.80107,0.34543,-1.37646,1.4964 units=m no_defs END Here I can see exactly the same behaviour. Editing other parameters, like lon_0, x_0 and y_0 are really changing the output, while editing towgs84 parameters or leaving them out totally has no effect. It looks to me that towgs84 parameters are not read at all, or all the parameters are interpreted as zeros. However, I can't believe that this error wouldn't have been noticed by others so far. So I am just giving the parameters in a wrong way? The ESRI projection file at MS4W\proj\nad\ doest have 2393 definitions with a bit different towgs84 values. Giving my layer definition as init=esri:2393 does not change anything, Mapserver does not use towgs84 parameters. -Jukka Rahkonen- ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] How to use NQUERY to identify features at a point?
Steve, Dan, Thank you for your answers. Using imgext and imgsize was the solution! In this case query instead of nquery was not an option, since query only returns one result. In case I would like to query by bounding box (instead of point), would the correct query be something like http://localhost/cgi-bin/mapserv.exe?map=my.mapmode=nquerymapext=minx+miny+maxx+maxylayers=pointsimgext=1.33+51.285252+5.678991+55.101323imgsize=594+522 ? I.e. imgxy for a point query becomes mapext for a bbox query? Thanks again for your help, kind regards, Arjen. On Mon, 02 Mar 2009 08:41 -0600, Steve Lime steve.l...@dnr.state.mn.us wrote: Arjen: Try using imgext instead of mapext, and imgsize instead of mapsize. Those params are used to convert the mouse click (imgxy) into map coordinates. Steve Arjen de Korte arje...@gmx.net 03/02/09 4:57 AM Dear Mapserver users, I would like to use a Mapserver NQUERY to identify features at a point on a map. I am now calling the following url using AJAX (I have defined XML templates in my mapfile to get an XML result): http://localhost/cgi-bin/mapserv.exe?map=my.mapmode=nqueryimgxy=45+246layers=pointsmapext=1.33+51.285252+5.678991+55.101323mapsize=594+522 I am getting a result, but Mapserver returns ALL features in the given bounding box (mapext), while I would like to get the features around the point given in imgxy (within the tolerance as defined in the mapfile). I have also tried this with mapxy and map coordinates instead of imgxy, but this gives the same results. My Mapserver version is 5.0.0. Could someone instruct me on the correct usage of NQUERY in this case? Thank you, kind regards, Arjen. ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
[mapserver-users] Database connection in postgresql
Hello friends, I am using map server application in which i am displaying my map in web browser. I am creating button in that browser and on that button i want to attach my database connection means if i click this button the database/tables should be open so how to proceed that? And my next question how to connect shape file to the postgresql in mapserver?? THANKS IN ADVANCE. ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] (no subject)
Check the documentation on the metaTile it requires having PIL installed but that is not really a big hassle. From: Nelson Correia nelson...@hotmail.com To: mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 6:17:10 AM Subject: [mapserver-users] (no subject) Hi, We are using Mapserver to produce tiles for a web application, using Tilecache as the caching mechanism. When we were building the system, we figured out that tiles requested does not fit well side by side (the roads of one tile does not fit the prolongation of the same road in the next tile). To eliminate this issue, we had to issue an extra 10 pixels (around the whole tile) request to Mapserver and then cut them. Then another problem arose: we could not make this with the labels because they appeared cut in one tile and there was no prolongation of it on the next tile. The solution was to divide it into different layers: one for the roads with the 10 pixels buffer and another for the labels without buffer. This has the impact of duplicating the total number of images. Anyone known an alternate solution for this problem? Isn't Mapserver capable of serving images that fit well side by side? Thanks in advance! check out the rest of the Windows Live™. More than mail–Windows Live™ goes way beyond your inbox. More than messages ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Database connection in postgresql
rohan phatak wrote: Hello friends, I am using map server application in which i am displaying my map in web browser. I am creating button in that browser and on that button i want to attach my database connection means if i click this button the database/tables should be open so how to proceed that? I'm not sure what/why you're trying to accomplish that, but you could take a look at this (1). You might be interested. And my next question how to connect shape file to the postgresql in mapserver?? If you mean : how do I connect mapserver to a postgis table : http://mapserver.org/input/vector/postgis.html If you mean : how do I transform my shapfile to a postgis table : use the shp2pgsql tool. http://www.postgis.org/documentation/manual-1.3/ch04.html#id2743056 THANKS IN ADVANCE. Regards, Alexandre (1) http://geo.openplans.org/geoext/drake/tags/v0.1/apps/drake/drake1.html ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users -- Alexandre Dubé Mapgears www.mapgears.com ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
RE: [mapserver-users ] Mapserver images d oesn't fit well on a tiling scheme
With metaTile I can issue a pre-defined number of tiles that fit well. But this is per-request (if I'm right). For instance, if I make two consecutive requests of 4 tiles each from consecutive map zones, I get two sets of tiles that does not fit with each other (the first 4 do not fit side by side with the second 4). The problem with that approach is that tiles from the same request fit well, but in order to construct a map like VE or Google Maps I need that tiles from different requests to always fit well. Please tell me If I am wrong. Date: Tue, 3 Mar 2009 05:44:05 -0800 From: danlit...@yahoo.com Subject: Re: [mapserver-users] (no subject) To: nelson...@hotmail.com; mapserver-users@lists.osgeo.org Check the documentation on the metaTile it requires having PIL installed but that is not really a big hassle. From: Nelson Correia nelson...@hotmail.com To: mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 6:17:10 AM Subject: [mapserver-users] (no subject) Hi, We are using Mapserver to produce tiles for a web application, using Tilecache as the caching mechanism. When we were building the system, we figured out that tiles requested does not fit well side by side (the roads of one tile does not fit the prolongation of the same road in the next tile). To eliminate this issue, we had to issue an extra 10 pixels (around the whole tile) request to Mapserver and then cut them. Then another problem arose: we could not make this with the labels because they appeared cut in one tile and there was no prolongation of it on the next tile. The solution was to divide it into different layers: one for the roads with the 10 pixels buffer and another for the labels without buffer. This has the impact of duplicating the total number of images. Anyone known an alternate solution for this problem? Isn't Mapserver capable of serving images that fit well side by side? Thanks in advance! check out the rest of the Windows Live™. More than mail–Windows Live™ goes way beyond your inbox. More than messages _ More than messages–check out the rest of the Windows Live™. http://www.microsoft.com/windows/windowslive/___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Mapserver images doesn' t fit well on a tiling scheme
I think you're a bit wrong there. If you build the Cache using tilecache, when you use the metaTiles it will take a larger sample than the image being generated, for example if you have a 3x3 meta tile grid, the center tile of the nine-tile grid will be used. I had the exact same problem you are describing, but then setup the tilecache generator to use metatiles and things started to work beautifully -- including labels. From: Nelson Correia nelson...@hotmail.com To: mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 8:11:16 AM Subject: RE: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme With metaTile I can issue a pre-defined number of tiles that fit well. But this is per-request (if I'm right). For instance, if I make two consecutive requests of 4 tiles each from consecutive map zones, I get two sets of tiles that does not fit with each other (the first 4 do not fit side by side with the second 4). The problem with that approach is that tiles from the same request fit well, but in order to construct a map like VE or Google Maps I need that tiles from different requests to always fit well. Please tell me If I am wrong. Date: Tue, 3 Mar 2009 05:44:05 -0800 From: danlit...@yahoo.com Subject: Re: [mapserver-users] (no subject) To: nelson...@hotmail.com; mapserver-users@lists.osgeo.org Check the documentation on the metaTile it requires having PIL installed but that is not really a big hassle. From: Nelson Correia nelson...@hotmail.com To: mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 6:17:10 AM Subject: [mapserver-users] (no subject) Hi, We are using Mapserver to produce tiles for a web application, using Tilecache as the caching mechanism. When we were building the system, we figured out that tiles requested does not fit well side by side (the roads of one tile does not fit the prolongation of the same road in the next tile). To eliminate this issue, we had to issue an extra 10 pixels (around the whole tile) request to Mapserver and then cut them. Then another problem arose: we could not make this with the labels because they appeared cut in one tile and there was no prolongati on of it on the next tile. The solution was to divide it into different layers: one for the roads with the 10 pixels buffer and another for the labels without buffer. This has the impact of duplicating the total number of images. Anyone known an alternate solution for this problem? Isn't Mapserver capable of serving images that fit well side by side? Thanks in advance! check out the rest of the Windows Live™. More than mail–Windows Live™ goes way beyond your inbox. More than messages check out the rest of the Windows Live™. More than mail–Windows Live™ goes way beyond your inbox. More than messages ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
[mapserver-users] Re: Mapserver WMS seem not to read +towgs84 parameters
I forget to mention that I am using epsg:3067 in my WMS requests while image data is in epsg:2393 so Mapserver for sure is reprojecting. -Jukka- Lähettäjä: Rahkonen Jukka Lähetetty: 3. maaliskuuta 2009 14:59 Vastaanottaja: mapserver-users@lists.osgeo.org Aihe: Mapserver WMS seem not to read +towgs84 parameters Hi, I am using Mapserver version 5.2.0 from MS4W delivery through WMS 1.1.1. and I was now trying to add the missing +towgs84 parameters for the Finnish epsg:2393 projection. I located the epsg file from MS4W\proj\nad directory and edited it from this: # KKJ / Finland Uniform Coordinate System 2393 +proj=tmerc +lat_0=0 +lon_0=27 +k=1 +x_0=350 +y_0=0 +ellps=intl +units=m +no_defs to this: # KKJ / Finland Uniform Coordinate System 2393 +proj=tmerc +lat_0=0 +lon_0=27 +k=1 +x_0=350 +y_0=0 +ellps=intl +towgs84=-96.0617,-82.4278,-121.743,4.80107,0.34543,-1.37646,1.4964 +units=m +no_defs However, adding +towgs84 parameters do not have any effect on the Mapserver output. I am sure that this certain epsg file is read, because commenting out the 2393 line makes Mapserver to stop working with my mapfile. In addition, I can make map to shift by editing +x_0 and +y_0 parameters. I had even another try by skipping the whole epsg file by giving the projection directly in the layer definitions of my mapfile as PROJECTION proj=tmerc lat_0=0 lon_0=27 k=1 x_0=350 y_0=0 ellps=intl towgs84=-96.0617,-82.4278,-121.743,4.80107,0.34543,-1.37646,1.4964 units=m no_defs END Here I can see exactly the same behaviour. Editing other parameters, like lon_0, x_0 and y_0 are really changing the output, while editing towgs84 parameters or leaving them out totally has no effect. It looks to me that towgs84 parameters are not read at all, or all the parameters are interpreted as zeros. However, I can't believe that this error wouldn't have been noticed by others so far. So I am just giving the parameters in a wrong way? The ESRI projection file at MS4W\proj\nad\ doest have 2393 definitions with a bit different towgs84 values. Giving my layer definition as init=esri:2393 does not change anything, Mapserver does not use towgs84 parameters. -Jukka Rahkonen- ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] How to use NQUERY to identify features at apoint?
You have two choices: 1) just use mapext or 2) use imgbox in conjunction with imgext and imgsize Option 1 is used when you're operating independent of a map interface (usually) and option 2 is common when your bbox is given in pixels (i.e. drawing a box on a map). Steve Arjen de Korte arje...@gmx.net 03/03/09 7:28 AM Steve, Dan, Thank you for your answers. Using imgext and imgsize was the solution! In this case query instead of nquery was not an option, since query only returns one result. In case I would like to query by bounding box (instead of point), would the correct query be something like http://localhost/cgi-bin/mapserv.exe?map=my.mapmode=nquerymapext=minx+miny+maxx+maxylayers=pointsimgext=1.33+51.285252+5.678991+55.101323imgsize=594+522 ? I.e. imgxy for a point query becomes mapext for a bbox query? Thanks again for your help, kind regards, Arjen. On Mon, 02 Mar 2009 08:41 -0600, Steve Lime steve.l...@dnr.state.mn.us wrote: Arjen: Try using imgext instead of mapext, and imgsize instead of mapsize. Those params are used to convert the mouse click (imgxy) into map coordinates. Steve Arjen de Korte arje...@gmx.net 03/02/09 4:57 AM Dear Mapserver users, I would like to use a Mapserver NQUERY to identify features at a point on a map. I am now calling the following url using AJAX (I have defined XML templates in my mapfile to get an XML result): http://localhost/cgi-bin/mapserv.exe?map=my.mapmode=nqueryimgxy=45+246layers=pointsmapext=1.33+51.285252+5.678991+55.101323mapsize=594+522 I am getting a result, but Mapserver returns ALL features in the given bounding box (mapext), while I would like to get the features around the point given in imgxy (within the tolerance as defined in the mapfile). I have also tried this with mapxy and map coordinates instead of imgxy, but this gives the same results. My Mapserver version is 5.0.0. Could someone instruct me on the correct usage of NQUERY in this case? Thank you, kind regards, Arjen. ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
RE: [mapserver-users ] Mapserver images d oesn't fit well on a tiling scheme
I'm not sure if I got it right... When I request a 3x3 meta tile grid, tilecache only caches the center image? What if I request the image on the right of it and again another image to the right? Tilecache will issue new and overlapped requests to Mapserver? Or for the second request it will reuse a tile from the previous 3x3 request? Date: Tue, 3 Mar 2009 06:46:58 -0800 From: danlit...@yahoo.com Subject: Re: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme To: nelson...@hotmail.com; mapserver-users@lists.osgeo.org I think you're a bit wrong there. If you build the Cache using tilecache, when you use the metaTiles it will take a larger sample than the image being generated, for example if you have a 3x3 meta tile grid, the center tile of the nine-tile grid will be used. I had the exact same problem you are describing, but then setup the tilecache generator to use metatiles and things started to work beautifully -- including labels. From: Nelson Correia nelson...@hotmail.com To: mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 8:11:16 AM Subject: RE: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme With metaTile I can issue a pre-defined number of tiles that fit well. But this is per-request (if I'm right). For instance, if I make two consecutive requests of 4 tiles each from consecutive map zones, I get two sets of tiles that does not fit with each other (the first 4 do not fit side by side with the second 4). The problem with that approach is that tiles from the same request fit well, but in order to construct a map like VE or Google Maps I need that tiles from different requests to always fit well. Please tell me If I am wrong. Date: Tue, 3 Mar 2009 05:44:05 -0800 From: danlit...@yahoo.com Subject: Re: [mapserver-users] (no subject) To: nelson...@hotmail.com; mapserver-users@lists.osgeo.org Check the documentation on the metaTile it requires having PIL installed but that is not really a big hassle. From: Nelson Correia nelson...@hotmail.com To: mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 6:17:10 AM Subject: [mapserver-users] (no subject) Hi, We are using Mapserver to produce tiles for a web application, using Tilecache as the caching mechanism. When we were building the system, we figured out that tiles requested does not fit well side by side (the roads of one tile does not fit the prolongation of the same road in the next tile). To eliminate this issue, we had to issue an extra 10 pixels (around the whole tile) request to Mapserver and then cut them. Then another problem arose: we could not make this with the labels because they appeared cut in one tile and there was no prolongati on of it on the next tile. The solution was to divide it into different layers: one for the roads with the 10 pixels buffer and another for the labels without buffer. This has the impact of duplicating the total number of images. Anyone known an alternate solution for this problem? Isn't Mapserver capable of serving images that fit well side by side? Thanks in advance! _ Drag n’ drop—Get easy photo sharing with Windows Live™ Photos. http://www.microsoft.com/windows/windowslive/products/photos.aspx___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Mapserver images doesn' t fit well on a tiling scheme
There are two steps to a tilecache... Step 1: Seeding it. Step 2: Querying from it. Metatile usefulness is best seen while seeding the tile cache. If you look at the attached graphic (a rough estimation of a 3x3 meta-tile setup) then you'll see as the tilecache seed iterates through the map, it oversamples the map and uses the center image to represent the tile (A). When moving onto the next tile (B), it performs the same over-sampling. Since the map is then never at the edge of the generation you do not see errors with off-map lines and labelling at the edges. Now, there two ways to query the tilecache: 1) As a WMS service. IMO, this is slow you can do as you wish but I've always thought this to be quite a bit slower than taking the oppurunity to fully seed a tilecache. In this scenario if you have a cache hit there is no additional generation costs. If you have a cache miss the generation cost is greater, but mapserver, PIL, etc., are very efficient at generating images. The actual cost of generating a 256x256 image and the cost of geneerating a 768x768 image is not terribly significant. Plus, once it has been done for a tile, it never needs to be done again. 2) As a tilecache, this is where you just serve up the directory as a TileCache. This is a lot faster but assumes you have fully seeded your cache. In this scenario you have no additional generation costs, all of that work has been done up front. From: Nelson Correia nelson...@hotmail.com To: mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 10:17:08 AM Subject: RE: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme I'm not sure if I got it right... When I request a 3x3 meta tile grid, tilecache only caches the center image? What if I request the image on the right of it and again another image to the right? Tilecache will issue new and overlapped requests to Mapserver? Or for the second request it will reuse a tile from the previous 3x3 request? Date: Tue, 3 Mar 2009 06:46:58 -0800 From: danlit...@yahoo.com Subject: Re: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme To: nelson...@hotmail.com; mapserver-users@lists.osgeo.org I think you're a bit wrong there. If you build the Cache using tilecache, when you use the metaTiles it will take a larger sample than the image being generated, for example if you have a 3x3 meta tile grid, the center tile of the nine-tile grid will be used. I had the exact same problem you are describing, but then setup the tilecache generator to use metatiles and things started to work beautifully -- including labels. From: Nelson Correia nelson...@hotmail.com To: mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 8:11:16 AM Subject: RE: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme With metaTile I can issue a pre-defined number of tiles that fit well. But this is per-request (if I'm right). For instance, if I make two consecutive requests of 4 tiles each from consecutive map zones, I get two sets of tiles that does not fit with each other (the first 4 do not fit side by side with the second 4). The problem with that approach is that tiles from the same request fit well, but in order to construct a map like VE or Google Maps I need that tiles from different requests to always fit well. Please tell me If I am wrong. Date: Tue, 3 Mar 2009 05:44:05 -0800 From: danlit...@yahoo.com Subject: Re: [mapserver-users] (no subject) To: nelson...@hotmail.com; mapserver-users@lists.osgeo.org Check the documentation on the metaTile it requires having PIL installed but that is not really a big hassle. From: Nelson Correia nelson...@hotmail.com To: mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 6:17:10 AM Subject: [mapserver-users] (no subject) Hi, We are using Mapserver to produce tiles for a web application, using Tilecache as the caching mechanism. When we were building the system, we figured out that tiles requested does not fit well side by side (the roads of one tile does not fit the prolongation of the same road in the next tile). To eliminate this issue, we had to issue an extra 10 pixels (around the whole tile) request to Mapserver and then cut them. Then another problem arose: we could not make this with the labels because they appeared cut in one tile and there was no prolongati on of it on the next tile. The solution was to divide it into different layers: one for the roads with the 10 pixels buffer and another for the labels without buffer. This has the impact of duplicating the total number of images. Anyone known an alternate solution for this problem? Isn't Mapserver capable of serving images that fit well side by side? Thanks in advance!
Re: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme???
On Tue, Mar 03, 2009 at 08:31:05AM -0800, Dan Little wrote: There are two steps to a tilecache... Step 1: Seeding it. Step 2: Querying from it. Metatile usefulness is best seen while seeding the tile cache. If you look at the attached graphic (a rough estimation of a 3x3 meta-tile setup) then you'll see as the tilecache seed iterates through the map, it oversamples the map and uses the center image to represent the tile (A). When moving onto the next tile (B), it performs the same over-sampling. Since the map is then never at the edge of the generation you do not see errors with off-map lines and labelling at the edges. This is incorrect. Instead, what happens, is that when you request, A, B, or C, the 3x3 grid centered around B is rendered. when you request tile D, E, or F, the 3x3 grid around E is rendered. In each case, a metaBuffer sized pixel boundary on all sides is created. So, a 3x3 metaTile is actually 768 (3*256) + 20 (2 * 10) - 788 pixels big. This way, things near the edges of tiles are still included, and you get fewer missed labels becasue the labels that san across the edges of A and B are included, where they wouldn't have been before. Regards, -- Christopher Schmidt MetaCarta ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
[mapserver-users] DGN V8 mapserver
Hi, is it possible to use Microstation DGN V8 files in Mapserver? I know it works for V7 files using OGR but I need this functionality for V8 files also. Could this work using the dgndirect library and (if so) can it be integrated in GDAL? Has anyone of you some experience with that? Would there be differences to V7 files in handling them, especially the use of autostyling? Thanks in advance, Holger ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme???
To summarize, here is the way to *completely* avoid truncated labels and edge artifacts: * use a 10 pixel metabuffer in your tilecache config (the number of metatiles is irrelevant, but as Chris points out, there'll be more labels included if you use a 3x3 (or more) metatiling scheme than a 1x1 one : metaTile=true metaSize=3,3 metaBuffer=10 * set a 10 pixel edge buffer in mapserver (so no labels are rendered in the 10 pixels on the edges of the image) : WEB METADATA labelcache_map_edge_buffer -10 END END * use PARTIALS FALSE in all your label blocks -- Thomas Bonfort CampToCamp ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Re: Mapserver WMS seem not to read +towgs84 parameters
Rahkonen Jukka wrote: I forget to mention that I am using epsg:3067 in my WMS requests while image data is in epsg:2393 so Mapserver for sure is reprojecting. Jukka, I believe the problem is that EPSG:3067 expands as: +proj=utm +zone=35 +ellps=GRS80 +units=m +no_defs with no +towgs84 value. From PROJ 4.6.0 on datum shifts are only applied if we know datum information for the source and destination coordinate system. If you want ETRS89 treated as equivelent to WGS84 you might want to add a +towgs84=0,0,0 in the EPSG 3067 entry in the epsg file too. Best regards, -- ---+-- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush| Geospatial Programmer for Rent ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme???
Thanks Chris and Thomas for clarifying... I think my thoughts were correct and my descriptions were not... go figure. MfG - Original Message From: thomas bonfort thomas.bonf...@gmail.com To: Christopher Schmidt crschm...@metacarta.com Cc: Dan Little danlit...@yahoo.com; mapserver-users@lists.osgeo.org Sent: Tuesday, March 3, 2009 12:01:45 PM Subject: Re: [mapserver-users] Mapserver images doesn't fit well on a tiling scheme??? To summarize, here is the way to *completely* avoid truncated labels and edge artifacts: * use a 10 pixel metabuffer in your tilecache config (the number of metatiles is irrelevant, but as Chris points out, there'll be more labels included if you use a 3x3 (or more) metatiling scheme than a 1x1 one : metaTile=true metaSize=3,3 metaBuffer=10 * set a 10 pixel edge buffer in mapserver (so no labels are rendered in the 10 pixels on the edges of the image) : WEB METADATA labelcache_map_edge_buffer -10 END END * use PARTIALS FALSE in all your label blocks -- Thomas Bonfort CampToCamp ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
