[GRASS-user] using orthortectification tool to orthorectify SPOT-5 images
Greetings I will receive a few SPOT-5 and I will need to Orthorectify them. First of all, how can I use i.ortho.photo in WIndows (the menu entry is disabled)? Second, does it already include a DEM product or I should download one? If I need to download, what free DEM do you suggest? Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Assess land cover change
Greetings I have 2 land cover maps (1990 and 1995) and I want to detect changes between them and create a change detection matrix. can this be done in GRASS? Regards, Luis Lisboa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Assess land cover change
Thank you Moritz Just one last question: is it possible to produce a raster product that attributes a code/color to a specific land cover change? Regards Luis On Wed, Oct 17, 2012 at 3:25 PM, Moritz Lennert mlenn...@club.worldonline.be wrote: On 17/10/12 15:46, Luis Lisboa wrote: Greetings I have 2 land cover maps (1990 and 1995) and I want to detect changes between them and create a change detection matrix. can this be done in GRASS? r.report and r.stats can be used to cross-tabulate two or more raster maps. r.report output is easier to read on-screen, but r.stats output is easier to post-process. Moritz ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Re: Is it possible to export labels in image?
Maybe the problem is other. this what I am doing: 1- produce a map 2- reclass this map (image1) 3- apply reclass over this same map to have labels) Might this be he problem? Thanks Luis On Thu, May 19, 2011 at 7:55 PM, Giovanni Manghi giovanni.man...@gmail.comwrote: Hi Luis, GIonanni Suggested me to use r.mapcalc new=@old_with_labels but I get a map with Nulls. Is there any way to export Labels? sorry, it works for me here. Any place where to download a sample of your rasters and give a try here? Cheers -- Giovanni -- ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Is it possible to export labels in image?
Hi GIonanni Suggested me to use r.mapcalc new=@old_with_labels but I get a map with Nulls. Is there any way to export Labels? THanks On Fri, May 13, 2011 at 8:44 AM, Luis Lisboa luislisboa1...@gmail.comwrote: Greetings I have an raster file with labels (used r.reclass). Is it possible to export (r.out.gdal in geotiff format) it with the labels? Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Defining color table rules- other classes
Greetings I have created a color table and defined colors for classes between 0-20. But, when I export It (as geotiff), it also defines colors for classes that does not exist (all black) or even for classes between 0-20 that does not have any pixel with that value. Is this expected? Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Defining color table rules- other classes
So, it also creates an black entry for values from 21 til 255 right? Thanks Luis On Mon, May 16, 2011 at 12:38 PM, Markus Metz markus.metz.gisw...@googlemail.com wrote: On Mon, May 16, 2011 at 1:09 PM, Luis Lisboa luislisboa1...@gmail.com wrote: Greetings I have created a color table and defined colors for classes between 0-20. But, when I export It (as geotiff), it also defines colors for classes that does not exist (all black) or even for classes between 0-20 that does not have any pixel with that value. Is this expected? gdal does that, because the geotiff format requires an entry in the color table for each value in the range of the selected data type (or no color table at all) Markus M ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Is it possible to export labels in image?
Greetings I have an raster file with labels (used r.reclass). Is it possible to export (r.out.gdal in geotiff format) it with the labels? Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Error while Compiling winGRASS with OSGEO4w- GDAL
Greetings I'm compiling winGRASS with OSGEO4w and I'm getting an error Unable to locate GDAL library. I have gdal but maybe I'm missing some file. can anyone indicate me which one is GDAL library? Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Re: Exporting Vector data to SHP (v.out.ogr)- takes a lot of time
Well in this case I'm building my Msc Thesis on GRASS (interfaces+functions+modles) and tyhat would mean loose some part of my work So, and since GRASS6.4.0 was expected to export this data, what can I do? is this a lack-of-memory problem? or sometyhing that other users haver already experienced? Thanks Luis On Mon, Nov 15, 2010 at 7:29 AM, Martin Landa landa.mar...@gmail.comwrote: Hi, 2010/11/12 Hamish hamis...@yahoo.com: Registering primiti 907000 907256 primitives registered 900k is a lot, but not crazy. you can also try GRASS 7. Martin -- Martin Landa landa.martin gmail.com * http://geo.fsv.cvut.cz/~landa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Re: Exporting Vector data to SHP (v.out.ogr)- takes a lot of time
The problem is that, I left it this night processing and, when I returned it has freezed. So, v.out.ogr is not being able to export vector files produced by r.to.vect... As I said, maybe it's related with some option in r.to.vect that is messing this up. Or something related with tables. Can anyone give me some tips on this? Thanks Luis ...that´ll be a HUGE vector file! So it´s normal, that it takes some minutes. On Thu, Nov 11, 2010 at 3:08 PM, Luis Lisboa luislisboa1...@gmail.comwrote: Greetings I have produced a vector map (with r.to.vector) with the following metadata: v.info test01 ++ | Layer: teste01 | | Mapset: Regional | | Location:Country | | Database:E:\v3 | | Title: | | Map scale: 1:1 | | Map format: native | | Name of creator: orbit | | Organization: | | Source date: Tue Nov 09 11:11:40 2010 | || | Type of Map: vector (level: 2) | | | | Number of points: 0 Number of areas: 213680 | | Number of lines:0 Number of islands:73649 | | Number of boundaries: 348770 Number of faces: 0 | | Number of centroids:213666 Number of kernels:0 | | | | Map is 3D: No | | Number of dblinks: 1 | | | | Projection: Universal Transverse Mercator (zone 0) | | N: 8832707.83027649S: 7028073.62772369 | | E: 1347458.42001915W:200792.5777576 | | | | Digitization threshold: 0 | | Comments: | | | ++ Now I'm trying to export it to SHAPEFILE but, after 10 minutes the processing bar is not even in 40%. What might be happening? I mean, is it some error with the vector or when I convert to vector (from raster)? Because, taking more than 10 minutes to export to vector it's not normal (I guess) and taking nearly 7 min to convert to vector also... Thanks for the reply Luis L ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Re: Exporting Vector data to SHP (v.out.ogr)- takes a lot of time
Hello Achim... Not really. It didn't work Let me start from the beggining: 1- My orioginal raster file has the following: | Type of Map: raster Number of Categories: 11 | | Data Type:CELL | | Rows: 5381 | | Columns: 4481 | | Total Cells: 24112261 | |Projection: UTM (zone -24) | |N: 9659623.5017993S: 8045266.26306668 Res: 300.01063719 | |E: 1077874.87767815W: -266394.50364563 Res: 299.993167 | | Range of data:min = 1 max = 11 | It's a landcover map 2- I convert to vectorusing the following expression r.to.vect -v input=teste01_l...@regional output=teste05 feature=area and it returns: Extracting areas... Building topology for vector map teste05... Registering primiti 907000907256 primitives registered 3527832 vertices registered Building areas... 321179 areas built 85875 isles built Attaching islands... Attaching centroids... Number of nodes: 671952 Number of primitives: 907256 Number of points: 0 Number of lines: 0 Number of boundaries: 586103 Number of centroids: 321153 Number of areas: 321179 Number of isles: 85875 Number of areas without centroid: 26 r.to.vect complete. My vector is: || | Type of Map: vector (level: 2) | | | | Number of points: 0 Number of areas: 321179 | | Number of lines:0 Number of islands:85875 | | Number of boundaries: 586103 Number of faces: 0 | | Number of centroids:321153 Number of kernels:0 | | | | Map is 3D: No | | Number of dblinks: 1 | | | | Projection: Universal Transverse Mercator (zone 0) | | N: 9659623.5017993S: 8045266.26306668 | | E: 911978.65632755W: -266394.50364563 | | | | Digitization threshold: 0 | | Comments: | | | ++ this is a vector composed by areas (as far as I wanted and I believe) 3- I reduced the region in order to export just a piece 4- I exported but, when I open it in QGIS I get an empty vector file 5- Then again: v.out.ogr -c input=test...@regional type=area dsn=c:\teste07.shp Exporting 321179 areas (may take some time)... And after 20 minutes it seems freezed It this too much polygons? On Fri, Nov 12, 2010 at 9:06 AM, Achim Kisseler a...@jupiter.uni-freiburg.de wrote: Am 12.11.2010 09:40, schrieb Luis Lisboa: The problem is that, I left it this night processing and, when I returned it has freezed. So, v.out.ogr is not being able to export vector files produced by r.to.vect... As I said, maybe it's related with some option in r.to.vect that is messing this up. Or something related with tables. Can anyone give me some tips on this? I guess it freezes because it uses so much memory. Please check if v.out.ogr works with a small vector map. E.g. shrink region before r.to.vect or choose only some features from the vector map to export. ? Achim Thanks Luis ...that´ll be a HUGE vector file! So it´s normal, that it takes some minutes. On Thu, Nov 11, 2010 at 3:08 PM, Luis Lisboa luislisboa1...@gmail.com mailto:luislisboa1...@gmail.com wrote: Greetings I have produced a vector map (with r.to.vector) with the following metadata: v.info http://v.info test01 ++ | Layer: teste01 | | Mapset: Regional | | Location:Country | | Database:E:\v3 | | Title: | | Map scale: 1:1 | | Map format: native | | Name of creator: orbit | | Organization: | | Source date: Tue Nov 09 11:11:40 2010 | || | Type of Map: vector (level: 2) | | | | Number of points: 0 Number of areas: 213680 | | Number of lines:0 Number of islands: 73649 | | Number of boundaries: 348770 Number of faces: 0 | | Number of centroids:213666 Number of kernels: 0 | | | | Map is 3D: No | | Number of dblinks: 1 | | | | Projection: Universal Transverse Mercator (zone 0) | | N: 8832707.83027649S: 7028073.62772369 | | E: 1347458.42001915W:200792.5777576
[GRASS-user] Exporting Vector data to SHP (v.out.ogr)- takes a lot of time
Greetings I have produced a vector map (with r.to.vector) with the following metadata: v.info test01 ++ | Layer: teste01 | | Mapset: Regional | | Location:Country| | Database:E:\v3 | | Title: | | Map scale: 1:1 | | Map format: native | | Name of creator: orbit | | Organization: | | Source date: Tue Nov 09 11:11:40 2010 | || | Type of Map: vector (level: 2) | | | | Number of points: 0 Number of areas: 213680 | | Number of lines:0 Number of islands:73649 | | Number of boundaries: 348770 Number of faces: 0 | | Number of centroids:213666 Number of kernels:0 | | | | Map is 3D: No | | Number of dblinks: 1 | | | | Projection: Universal Transverse Mercator (zone 0) | | N: 8832707.83027649S: 7028073.62772369 | | E: 1347458.42001915W:200792.5777576 | | | | Digitization threshold: 0 | | Comments: | | | ++ Now I'm trying to export it to SHAPEFILE but, after 10 minutes the processing bar is not even in 40%. What might be happening? I mean, is it some error with the vector or when I convert to vector (from raster)? Because, taking more than 10 minutes to export to vector it's not normal (I guess) and taking nearly 7 min to convert to vector also... Thanks for the reply Luis L ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Error when importing data in Windows with Python Script
Greetings I'm running a Python script in WinGRASS6.4 but when I insert as the input C:\Data\L5216065_06520070405_B70.TIF inside Python Script, the input is: C:DataL5216065_06520070405_B10.TIF I realized that, if I, by-hand, i change the \ by / it runs ok. is it possible to have an automatic process to change this instead of having the users doing this by-hand? Thanks Luis Lisboa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Question regarding Wiki: Compiling GRASS on MS-Windows
I'm following this wiki http://trac.osgeo.org/grass/wiki/CompileOnWindows and I have one question regarding: Download the MinGW packages: (* updates may be found herehttps://sourceforge.net/project/showfiles.php?group_id=2435 *) - *Temp bugfix* (see here http://trac.osgeo.org/osgeo4w/ticket/118), * msysCORE-1.0.11-bin* from herehttp://downloads.sourceforge.net/mingw/msysCORE-1.0.11-bin.tar.gz THis is asking me to install in C:\MinGW. Is this ok or I should install in c:\osgeo4w folder? Thanks Best regards, Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Application of r.color
Hi there I have a script where I create a map (using mapcalc) and I want to attribute a color (gray for instance) but it ranges from 0 to 5 so I cannot attribute gray0-1 neither gray0-255. What can I do to attribute a color table that stretches its color attibution to the image max and minimum values? Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Multiple arguments in a grass.command- Python
Greetings I have a script where I need to define a region based on 2 rasters output[0] and output[1]. I'm using thwe following expression: grass.run_command(g.region, rast = output[2] output[3], res= t_srx) But This is not correct. my question is how can I have both rasters without getting an error? (I have tried also with grass.run_command(g.region, rast = output[2],output[3], res= t_srx) and it didn't workl Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] GRASS vectorial and raster data structure- Documentation
Hi there I'm using GRASS in my master thesis and I forgot an very important issue: Since I'm producing data in GRASS format (vectorial and raster) I need to have chapter regarding data structure. I only found a GRASS data structure information in GDAL/OGR website. Is there any other wiki/webpag with that information? Thanks Best regards, Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Converting raster to Vector (areas)- Question
Hello Markus and GRASS ML But these two areas can have the same category, here 1, and you can add more info for each category to the attribute table. But can I do that while running r.to.vect? If yes, How? ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Converting raster to Vector (areas)- Question
Greetings I have a labeled/classified image like this (hoje this displayed correctly ): 1 1 1 1 1 1 3 2 2 2 1 1 1 3 2 2 1 1 1 1 3 2 1 4 4 4 4 4 4 4 4 4 4 4 4 When I convert this to vector (areas) the pixel with value 1 in row 4 is considered a different area from the one with all ones but it shouldn't because it's connected with the 1 big area by pixel corner. My question is: how can I convert tyhis to vector and still consider that 1 as being part of the big clusters of 1? Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Defining a Global Variable in WinGRASS
Greetings I saw a few messages regarding global variable and I reminded that I had this question: - At WinGRASS I need to define a TEMP_folder (destination for temp files) for a few scripts and modules. and I wanted to define as a GRASS GLOBAL VARIABLE (just like GISBASE). Is it possible? Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Customize GRASS GUIs modules
I'm using GRASS6.4 with WxGUI and I'm using it to display to a few teachers some processed images (e.g. NDVIs, statistical analysis of images, bla bla bla) but they are complaining about the modules interfaces. Their complaints regards colours, GRASS's icon (they say it should be bigger) and mainly colours :). What I would like to know is in which WxGUI file is modules appearence defined and if I can change it ? Thanks Best regards, Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Warnings while importing Kompsat-2 images
Regarding this issue, at GDAL mailing list they told me: This is not a critical error, only a warning. However, if you are in contact with the data producer you might encourage them to bring their TIFF production into agreement with the specification which requires that the last byte of these text items should be a zero byte. On Tue, May 25, 2010 at 9:13 AM, Luis Lisboa luislisboa1...@gmail.comwrote: Hello Hamish On Mon, May 24, 2010 at 6:50 PM, Hamish hamis...@yahoo.com wrote: I believe these are actually GDAL warning messages and not GRASS ones. Will gdalinfo and/or gdal_translate work with the files? Yes they do work... ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Warnings while importing Kompsat-2 images
Hello Hamish On Mon, May 24, 2010 at 6:50 PM, Hamish hamis...@yahoo.com wrote: I believe these are actually GDAL warning messages and not GRASS ones. Will gdalinfo and/or gdal_translate work with the files? Yes they do work... ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Warnings while importing Kompsat-2 images
Hi there I imported Kompsat-2 images using r.in.gdal and I gfot this warnings: rning 1: TIFFFetchNormalTag:ASCII value for tag DocumentName does not end in null byte Warning 1: TIFFFetchNormalTag:ASCII value for tag ImageDescription does not end in null byte Warning 1: TIFFFetchNormalTag:ASCII value for tag Artist does not end in null byte Warning 1: TIFFFetchNormalTag:ASCII value for tag HostComputer does not end in null byte Projection of input dataset and current location appear to match What is the origin of this? Or what can I do to avoid this? Kompsat-2 images are followed by an header txt. can that be useful? Because it has recognized projection, the resolution is the same and even nº of cols/rows. Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Calculate statistics for raster values in polygons
Greetings I have a vectorial data that divides my region in sub-areas. I want to calculate the average value of a raster but instead for all pixel values, I want to calculate the average of pixel values that are inside each polygonIs this possible in GRASS? If yes, how? Thank you Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] ORFEO integration/interface with GRASS
Greetings I would like to know if anyone as tried to integrate or build an interface between GRASS and ORFEO toolbox (OTB) http://www.orfeo-toolbox.org/otb/ This tool has a lot of segmentation tools and classifiers that can be used in QGIS. I wanted to know if it's possible to integrate/use in (or with) GRASS. Thank you Best regards Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] WMS maps in i.class
Hi everyone I'm starting to using i.class function and I have a question; instead of using Landasat or other imported images, is it possible to use a WMS image? Best regards, Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Univariate Statistics
Greetings I need to do some univariate statitstics that goes beyond the max/min/median/average/standard deviation. I need to do some outliers detection, distribution analysis and some more basic statistics. Since GRASS doesn't perform this I would like to know what are people using? Some statistical Python module (e.g. Statpy) or other software? Thanks Best regards, Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Univariate Statistics
Thank you I realized that there is a r.univar.zone and an r.univar. What is the main difference between them? (they seems alike) Luis On Tue, Mar 2, 2010 at 9:33 AM, Jose A. Ruiz-Arias jarar...@ujaen.eswrote: You probably should consider R. Take a look at http://grass.itc.it/statsgrass/grass_geostats.html Jose Luis Lisboa escribió: Greetings I need to do some univariate statitstics that goes beyond the max/min/median/average/standard deviation. I need to do some outliers detection, distribution analysis and some more basic statistics. Since GRASS doesn't perform this I would like to know what are people using? Some statistical Python module (e.g. Statpy) or other software? Thanks Best regards, Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user -- José A. Ruiz-Arias Solar Radiation and Atmosphere Modelling Group http://matras.ujaen.es Department of Physics University of Jaén Campus Lagunillas, Building A3, Dep 066 23071, Jaén (Spain) Tlf: +34 953 212474 Fax: +34 953 212838 ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] HTML manuals languages
Greetings I would like to know if it's possible to have html manual pages in different languages besides English. I mean, the LC_Languages, in locale, can also be applied to the English html manual pages? Thanks Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Geometric Correction
Ok I see Are there any remains from the code that was stuck in GRASS 4/5? On Thu, Feb 4, 2010 at 2:11 PM, Markus Neteler nete...@osgeo.org wrote: On Thu, Feb 4, 2010 at 2:06 PM, Luis Lisboa luislisboa1...@gmail.com wrote: Relevant for you is this: - implement/finish linewise ortho-rectification of satellite data ...unfortunately stuck since GRASS 4/5... Regarding this... According to Lillesand and Kiefer the idea is to correct geometric distortions of the image. For instance, the Georrectify module is not enough? or the i.rectify function? It is not enough because it is made for aerial photos (central projection) while satellite data are line-wise scanners (so central projection only in one direction). It would be great to see the existing algorithms integrated. Ok Since I will need to do some work on this, at the end I can contribute with some code/functions great! happy hacking, Markus ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Geometric Correction
Relevant for you is this: - implement/finish linewise ortho-rectification of satellite data ...unfortunately stuck since GRASS 4/5... Regarding this... According to Lillesand and Kiefer the idea is to correct geometric distortions of the image. For instance, the Georrectify module is not enough? or the i.rectify function? It would be great to see the existing algorithms integrated. Ok Since I will need to do some work on this, at the end I can contribute with some code/functions Cheers Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Geometric Correction
While I was reading chapter 8, from Neteler Mitasova GRASS Book, I realized that there is no specific sub-chapter related with Geometric Correction. This process is to compensate for the distortions introduced by these factors so that the corrected image will have the highest practical geometric integrity (Lillesand Kiefer). My question is: How can this be done in GRASS? I suppose it's done since LANDSAT-TM need geometric correction and, all GRASS book refers to LANDSAT images. I just need a couple of tips :) Thank you Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Defining Minimum Mapping Units
Greetings all I've been reading a Remote Sensing classic Remote Sensing and Image intepretation by Lillesand and Kiefer. :) By Those guys Minimum Mapping Units are the smallest size areal entity to be mapped as a discrete area. They also state that: The size of a minimum area that can be mapped as any particular land use/land cover class depends on the scale and resolution of the satellite images. Ok, now my situation :). I need to produce a few land cover maps, after classification, with an aggregation of a defined minimum mapping unit(MMU) for a scale of 1:5. As far as I can see, I would say that MMU would be minumum size of a polygon that can be mapped. For istance what Would I have to do to aggregate a classification map with a minimum area of 20 km^2? Thanks Best regards ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] g.parser's Module/header options
Hey you all I'm reading g.parser description from GRASS website and I'm reading a description of typical header definitions and notes. What I wanted to know is where I can find a description of all parameters (e.g. key, type, description, multiple, ...) that are available and that is possible to know. Thanks Luis L. ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Wxpython vector digitizer
Hi Due to the fact that i.class is not available at Windows I decided to start using GRASS on Linux. I have just installed and compiled. When I start grass64 I get this warning: *WARNING: Vector digitizer is not available (No module named grass6_wxvdigit).* *Note that vector digitizer is currently not working under MS Windows (hopefully will be fixed soon). Please try more recent version of GRASS.* But since I'm now using LINUX :), I don't give a damn about that. But unfortunely, in GIS lay Manager Start Editing option is not available. And, when I select Digitizer at GIS Map Display, I get the following error window * Unable to start vector digitizer. * *The VDigit python extension was not found or loaded properly.* *Switching back to 2D display mode* *Details: No module named grass6_wxdigit* * * What am I missing because it was suppose to be working.. Thanks and happy holidays for everyone. Luis Lisboa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Error while starting GRASS6.4
Good Evening I have just installed GRASS 6.4 in a Linux and I got this error while trying to start GRASS with WXPYTHON. /usr/lib64/python2.4/site-packages/wx-2.8-gtk2-unicode/wx/_core.py:14448: UserWarning: wxPython/wxWidgets release number mismatch warnings.warn(wxPython/wxWidgets release number mismatch) Could anyone telm what this means? Is this a normal error? Thanks Cheers, Luis ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] Supervised classification without i.class
Hello Martin thanks for your reply. I am afraid not -- only non-interactive approach. Digitize areas, rasterize vector areas and use i.gensig. Ok. But If I try to have Linux or Mac OS machine, I could use i.class right? About your links, ehehehe unfortunely Czech is not in my language domain (English, Spanish, French, Catalan). But I will try to get some ideas :) Thanks Import data to native format using v.out.ogr or link data using v.external (some problems can occur). The OGR interface is being improved in GRASS 7. Uhm I'm planning to use 6.4 (it has binaries). has anyone tried with success this operation? Thanks Best regards Luis Lisboa Universitat Pompeu Fabra, Barcelona ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Defining location/mapset
Hello people I'm planning to use GRASS but I have one question about location/mapset organization. I'm going to do some classification and image processing for a certain region of Spain at 3 different levels: local, regional and national. This different scales have different scale definition with higher scale definition for local and lower for national (1:100). I will use different satellite images for different scales but some vectorial (e.g. roads) will be used for all three scales. National scale includes all country, regional only a certain region and local (a specific and very small area). According to GRASS database and common structure I will store my data at a GISDBASE. Within this directory, GRASS GIS data are organized by projects. Since its location is defined by its coordinate system, map projection and geographic boundaries my question is: Should I have a different location for each scale? I would say so, right? If that is the case, I would define mapsets as different data sources or produced maps. Thanks all, Luis Lisboa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] GRASS6.4 in Linux
Greetings all I want to install GRASS in a LINUX machine where I will develop a few scripts and functions (in C). According to http://grass.itc.it/download/index.php if I want to develop I should download source code and compile Can I just install a binary, develop my functions/scripts and compile those to the compiled version? Thanks Best regards Luis Lisboa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] Fwd: New updates
Greetings I want to develop a few modules and functions to use internally in my lab and people would use wxpython GUI in Windows environment. What I want to know is which GRASS version should I start using? 6.4 (stable and available to WINDOWS), 6.5 or 7? What I mean is, in a couple months probably 6.4 will be discontinued and people will be using 7 so my code and applications will be outdated and I will have to redone them to GRASS7 version Thanks Best Regards Luis Lisboa ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
