Re: [mapserver-users] the lines one above other
Lars, Thanx in any event for devoting your attention. Vladimir, I see, so you do not need the order of the LAYERS but the order of the FEATURES. I did not understand that correctly at first, sorry. In that case, I guess Andreas approach would be the one. Best Lars ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] the lines one above other
Hi,
With OSM and Mapnik it is a two phase process. First osm2pgsql tries to
generate sensible z-index values and then Mapnik makes “order by” queries to
the database. The queries are here
https://github.com/gravitystorm/openstreetmap-carto/blob/master/project.yaml
and as an example
(SELECT way,
COALESCE((
'highway_' || (CASE WHEN highway IN ('residential', 'unclassified',
'pedestrian', 'service', 'footway', 'cycleway', 'track', 'path', 'platform')
THEN highway ELSE NULL END)),
('railway_' || (CASE WHEN railway IN ('platform') THEN railway ELSE NULL END))
) AS feature
FROM planet_osm_polygon
WHERE highway IN ('residential', 'unclassified', 'pedestrian', 'service',
'footway', 'track', 'path', 'platform')
OR railway IN ('platform')
ORDER BY z_order, way_area DESC
) AS highway_area_casing
-Jukka Rahkonen-
Vladimir wrote:
Bobb
Thanks you very much for detailed answer.
I'll have to place the parts of lines in various layers.
There is no other elegant decision as i understood, but I wonder how
web-map-giants like GOOGLE or OSM get out of this scrape.
Vladimir,
I’ve faked this in the past by drawing the same layer many times in one pass
(inside of the same mapfile), you need at least one complete layer pass, with
other partial layers for the over/under situations. You can do the partial
layer grouping with attributes on the segments that need to go under or over,
and this is a manual process for the most part, but it’s a real pain to keep
that up to date over time (I’m talking over years) . I could probably find a
programmer that thought of this as a challenge, but you still need a human to
decide what is over something else as a last QA.
The much harder task is defining which layers (partial segments are over/under
other layers.. You need to remove some line segments form at least one of the
layers in order to make things display correctly. Sometimes a layer is over,
sometime it’s under. I actually have two instances in my mapping system, where
I have three different bridges stacked on top of each other, two of them a
roadways, with the odd one in between them. The other has a Railway bridge
over a roadway bridge crossing.
The z-index stuff has always been a painful thing thing to keep updated, but it
is doable.
I’ve rencetly been looking at this myself for hardcopy pringing purposes. As
well.
Bobb
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Re: [mapserver-users] the lines one above other
Bobb Thanks you very much for detailed answer. I'll have to place the parts of lines in various layers. There is no other elegant decision as i understood, but I wonder how web-map-giants like GOOGLE or OSM get out of this scrape. Vladimir, I’ve faked this in the past by drawing the same layer many times in one pass (inside of the same mapfile), you need at least one complete layer pass, with other partial layers for the over/under situations. You can do the partial layer grouping with attributes on the segments that need to go under or over, and this is a manual process for the most part, but it’s a real pain to keep that up to date over time (I’m talking over years) . I could probably find a programmer that thought of this as a challenge, but you still need a human to decide what is over something else as a last QA. The much harder task is defining which layers (partial segments are over/under other layers.. You need to remove some line segments form at least one of the layers in order to make things display correctly. Sometimes a layer is over, sometime it’s under. I actually have two instances in my mapping system, where I have three different bridges stacked on top of each other, two of them a roadways, with the odd one in between them. The other has a Railway bridge over a roadway bridge crossing. The z-index stuff has always been a painful thing thing to keep updated, but it is doable. I’ve rencetly been looking at this myself for hardcopy pringing purposes. As well. Bobb ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] mapserv 7.0 and gif
According to http://www.mapserver.org/MIGRATION_GUIDE.html#mapserver-6-4-to-7-0-migration: * GD graphics library support was removed (http://www.mapserver.org/development/rfc/ms-rfc-99.html) and had been optional since 6.2. * GIF output cannot be produced from MapServer although 8-bit PNG output can be be produced using the AGG/PNG8 driver. It is no longer supported if I understand it correctly. -Ursprüngliche Nachricht- Von: mapserver-users-boun...@lists.osgeo.org [mailto:mapserver-users- boun...@lists.osgeo.org] Im Auftrag von Richard Greenwood Gesendet: Freitag, 13. Februar 2015 04:13 An: mapserver Betreff: [mapserver-users] mapserv 7.0 and gif Very exciting to see the 7.0 beta! So I built it and satisfied the gif dependency. I define a gif OUTPUTFORMAT definition in my map file, I request a map with map_imagetype=image/gif but I get a PNG. So is gif support truly gone in 7.0? And if so, it seems a little misleading to have a libgif dependency in the build, to allow a gif OUTPUTFORMAT definition, and to allow a map_imagetype=image/gif request. In any case - thanks for all the work getting to 7.0! Rich -- Richard W. Greenwood, PLS www.greenwoodmap.com ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] [EXTERNAL] Re: the lines one above other
Sorry, I have some correction, it is right illustrations: Result when order by asc: http://s28.postimg.org/lqs8nxw31/asc.jpg Result when order by desc: http://s12.postimg.org/xondilekt/desc.jpg ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] [EXTERNAL] Re: the lines one above other
I would draw your attention to the source of this discussion.
http://osgeo-org.1560.x6.nabble.com/the-lines-one-above-other-td5187093.html
It seems I found how to display multilevel junction of highway with ORDER BY
in the case using a one layer. Adding order by id desc or order by id asc
in subquery, also the definition $highwayStyle2 besides $highwayStyle1 works
fine.
Please see the code and the illustrations below:
--
$highwayLayer-set('status', MS_ON);
$highwayLayer-set('name', 'highway');
$highwayLayer-set('labelitem', 'name');
$highwayLayer-setConnectionType(MS_POSTGIS);
$highwayLayer-set('connection', 'user=my_user password=my_pass dbname=my_db
host=localhost');
$highwayLayer-set(data,geom from (select id, 'id = '||id as name, geom from
my_table
where ST_Intersects(geom, !BOX!) order by id desc) as subquery using unique id
using srid=3857);
$highwayLayer-setprocessing(close_connection=defer);
$highwayLayer-set(type,MS_LAYER_LINE);
$highwayClass = new ClassObj($highwayLayer);
$highwayClass-set('name', 'highway');
$highwayStyle1 = new styleObj($highwayClass);
$highwayStyle1-color-setRGB(254,173,0);
$highwayStyle1-set('linecap','square');
$highwayStyle1-set('width',4);
$respdorStyle1-outlinecolor-setRGB(255,0,0);
$respdorStyle1-set('outlinewidth',2);
$highwayStyle2 = new styleObj($highwayClass);
$highwayStyle2-color-setRGB(254,173,0);
$highwayStyle2-set('linecap','square');
$highwayStyle2-set('width',4);
$respdorStyle2-outlinecolor-setRGB(255,0,0);
$respdorStyle2-set('outlinewidth',2);
-
Result when order by id asc:
http://s22.postimg.org/esbobf18x/order_by_id_asc.jpg
Result when order by id desc:
http://s10.postimg.org/qeokp2jrd/order_by_id_desc.jpg
-
That's the goods for me but there is the impression of using some undocumented
singularity.
Thanx for any comments.
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Re: [mapserver-users] mapserver 7 wfs_encoding
http://mapserver.org/development/rfc/ms-rfc-103.html -- thomas On 13 February 2015 at 10:17, steve.tout...@inspq.qc.ca wrote: Congratulations for the huge improve performance for WFS filtering with postgis and oracle... Mapserver 7 doesn't use wfs_encoding specified in the mapfile anymore, I see anything in the changelog about that. Is there something change? ___ 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] [EXTERNAL] Re: the lines one above other
It seems I found how to display multilevel junction of highway with ORDER BY in the case using a one layer. Adding order by id desc or order by id asc in subquery $highwayLayer-set(data,geom from (select id, 'id = '||id as name, geom from my_table where ST_Intersects(geom, !BOX!) order by id desc) as subquery using unique id using srid=3857); Be careful with that as you cannot expect this to work consistently as long as MapServer wraps it in a subquery. The database will likely return your features either in storage order or in index order depending if it uses a sequential scan or the index. You should not rely on an ORDER BY within a subquery... ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] [EXTERNAL] Re: the lines one above other
You can do it in a single layer, provided that you have someway of
determining via attributes that a given road segment isn't connected
to other road segments below it (typically that would be something
saying it's a bridge rather than a regular road). The behavior is
undocumented and relies on the knowledge of how mapserver treats the
line cache for casing.
CLASS
EXPRESSION ([type]=bridge)
STYLE
END
STYLE
WIDTH 5
COLOR bridge_outline_color
LINECAP butt
END
STYLE
WIDTH 3
COLOR highway_color
END
END
CLASS
STYLE
WIDTH 5
COLOR highway_outline_color
END
STYLE
WIDTH 3
COLOR highway_color
END
END
(The trick is to add an empty style block so the rendering order for
bridges is offset by one compared to normal roads)
In your sql query, you also use an order by z_level asc so higher
roads get drawn after (=over) lower ones.
You might want to take a look at https://github.com/mapserver/basemaps
where this (along with other tricks for dealing with complex road
maps) is used.
--
thomas
On 13 February 2015 at 07:52, Vladimir f...@inbox.ru wrote:
I would draw your attention to the source of this discussion.
http://osgeo-org.1560.x6.nabble.com/the-lines-one-above-other-td5187093.html
It seems I found how to display multilevel junction of highway with ORDER
BY in the case using a one layer. Adding order by id desc or order by id
asc in subquery, also the definition $highwayStyle2 besides $highwayStyle1
works fine.
Please see the code and the illustrations below:
--
$highwayLayer-set('status', MS_ON);
$highwayLayer-set('name', 'highway');
$highwayLayer-set('labelitem', 'name');
$highwayLayer-setConnectionType(MS_POSTGIS);
$highwayLayer-set('connection', 'user=my_user password=my_pass dbname=my_db
host=localhost');
$highwayLayer-set(data,geom from (select id, 'id = '||id as name, geom
from my_table
where ST_Intersects(geom, !BOX!) order by id desc) as subquery using unique
id using srid=3857);
$highwayLayer-setprocessing(close_connection=defer);
$highwayLayer-set(type,MS_LAYER_LINE);
$highwayClass = new ClassObj($highwayLayer);
$highwayClass-set('name', 'highway');
$highwayStyle1 = new styleObj($highwayClass);
$highwayStyle1-color-setRGB(254,173,0);
$highwayStyle1-set('linecap','square');
$highwayStyle1-set('width',4);
$respdorStyle1-outlinecolor-setRGB(255,0,0);
$respdorStyle1-set('outlinewidth',2);
$highwayStyle2 = new styleObj($highwayClass);
$highwayStyle2-color-setRGB(254,173,0);
$highwayStyle2-set('linecap','square');
$highwayStyle2-set('width',4);
$respdorStyle2-outlinecolor-setRGB(255,0,0);
$respdorStyle2-set('outlinewidth',2);
-
Result when order by id asc:
http://s22.postimg.org/esbobf18x/order_by_id_asc.jpg
Result when order by id desc:
http://s10.postimg.org/qeokp2jrd/order_by_id_desc.jpg
-
That's the goods for me but there is the impression of using some
undocumented singularity.
Thanx for any comments.
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[mapserver-users] mapserver 7 wfs_encoding
Congratulations for the huge improve performance for WFS filtering with postgis and oracle... Mapserver 7 doesn't use wfs_encoding specified in the mapfile anymore, I see anything in the changelog about that. Is there something change?___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
Re: [mapserver-users] mapserv 7.0 and gif
Richard, Allowing for image/gif in requests and GIF outputformats is to allow existing mapfiles and requests to still be serviced without breaking, even though the returned format will be png. The gif dependency is there to allow loading of gif pixmap symbols, as was already the case. -- thomas On 12 February 2015 at 22:13, Richard Greenwood richard.greenw...@gmail.com wrote: Very exciting to see the 7.0 beta! So I built it and satisfied the gif dependency. I define a gif OUTPUTFORMAT definition in my map file, I request a map with map_imagetype=image/gif but I get a PNG. So is gif support truly gone in 7.0? And if so, it seems a little misleading to have a libgif dependency in the build, to allow a gif OUTPUTFORMAT definition, and to allow a map_imagetype=image/gif request. In any case - thanks for all the work getting to 7.0! Rich -- Richard W. Greenwood, PLS www.greenwoodmap.com ___ 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 7 wfs_encoding
oh! That means that if our database or datasource is encoded iso-8859-1, we need to set ENCODING iso-8859-1 in all our layers, there is no parameter at the MAP level right? And, Mapfiles themselves will be expected to be UTF8-encoded. Non UTF8-encoded mapfiles will need to be iconv?d to utf8. That means we cannot right any mapfile in iso-8859-1. we need to set our IDe to write in utf-8. Is my understanding correct? thomas bonfort thomas.bonf...@gmail.com 2015-02-13 10:21 A steve.tout...@inspq.qc.ca cc MapserverList OSGEO mapserver-users@lists.osgeo.org Objet Re: [mapserver-users] mapserver 7 wfs_encoding http://mapserver.org/development/rfc/ms-rfc-103.html -- thomas On 13 February 2015 at 10:17, steve.tout...@inspq.qc.ca wrote: Congratulations for the huge improve performance for WFS filtering with postgis and oracle... Mapserver 7 doesn't use wfs_encoding specified in the mapfile anymore, I see anything in the changelog about that. Is there something change? ___ 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 7 wfs_encoding
Yes, that is correct. We need to update the migration guide to include this. On 13 February 2015 at 10:39, steve.tout...@inspq.qc.ca wrote: oh! That means that if our database or datasource is encoded iso-8859-1, we need to set ENCODING iso-8859-1 in all our layers, there is no parameter at the MAP level right? And, - Mapfiles themselves will be expected to be UTF8-encoded. Non UTF8-encoded mapfiles will need to be iconv’d to utf8. That means we cannot right any mapfile in iso-8859-1. we need to set our IDe to write in utf-8. Is my understanding correct? *thomas bonfort thomas.bonf...@gmail.com thomas.bonf...@gmail.com* 2015-02-13 10:21 A steve.tout...@inspq.qc.ca cc MapserverList OSGEO mapserver-users@lists.osgeo.org Objet Re: [mapserver-users] mapserver 7 wfs_encoding http://mapserver.org/development/rfc/ms-rfc-103.html -- thomas On 13 February 2015 at 10:17, steve.tout...@inspq.qc.ca wrote: Congratulations for the huge improve performance for WFS filtering with postgis and oracle... Mapserver 7 doesn't use wfs_encoding specified in the mapfile anymore, I see anything in the changelog about that. Is there something change? ___ 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] the lines one above other
There is question about placing the parts of lines in various layers. I added the small part of line above the highway with linecap=butt for stops the line exactly at the end as described in http://mapserver.org/mapfile/symbology/construction.html#linecap. But butts of the line has some thin border, please see the pic: http://s8.postimg.org/iymc3az9h/linecap_butt.jpg How to escape this? Thanx. ___ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
