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I have two raster files: raster A and raster B. Raster A is the bigger raster and raster B covers some parts of raster A. I want to extract those grids from Raster A which are not covered by raster B. I usually do using extract by mask but this time, it is the other way round. So looking for...

My question is about how coordinate systems affect comparison of different layers - I have tried to refresh my memory about coordinate systems in GIS, but am still unsure about this situation. Any guidance is appreciated. I am comparing the land cover classifications (estimates of the % each...

I have a land use / cover raster map published in GeoServer 2.6. When I use the query tool I get the pixel value (eg.: 1). Is there a way for geoserver to return what the value 1 means in my land use raster? For instance, 1:Agriculture; 2:Forest etc... أكثر...

I have a bathymetric data set (Float32) and a standard DEM (Int16). I'm struggling to merge them using "Raster>Merge". I've set "nodata" to -9999 using "conversion>translate" this displays the DEM nodata as -3.40282e+35. The final merge retains nodata of one dataset depending on input order...

We have portal setup at a URL similar to the following through a reverse proxy: http:///arcgis/home The WebContextURL parameter is set to this: https:///arcgis Almost everything is working as it should. The only problem we are having now is when we try to create a an App using a...

i am trying to implement a simple "zoom to this point" link within a CartoDB infowindow. To do this i figure i need: To be able to place a script within an infowindow (mustache) template, so that the zoom link can be dynamically set Access to the lat/lng value that was clicked Its not...

Bonjour, ça a l'air assez simple, mais je ne trouve pas... J'ai 2 couches de cercles avec des attributs de même type dont un que l'on peut appeler NOM. Je souhaite sélectionner les cercle qui ont le même nom ET se touchent des 2 couches. Je précise que sur chaque couche 2 cercle de...

J'ai installer arcgis9.2 single et son dingle sur mon nouveau PC portable 64bits windows7profess mais il ne tourne pas il ne toune pas أكثر...

Bonjour, je me trouve confronter à un probléme d'extraction de ma table, aprés avoir tracé ma grille sur arc gis 10. je veux extraire les coordonnées des différents points. Merci. cordialement Une question = un post Merci de ne pas poser vos question à la suite des autres et de...

I would like to export OGR Geometry in WKB format, so I used the function OGRGeometry::exportToWkb from OGR, the problem that the buffer returned by the function is empty and OGRERR_NONE is always returned. int iSize = poGeom->WkbSize() ; // poGeom is OGRGeometry*if( iSize == 0 ) return...

I have created a feature class from the results of a 1:many join between a table and a polygon layer in ArcGIS 10.3. The polygon layer contains land parcels and the table contains names. Where a 1:many join was present, ArcGIS duplicated the geometry so that for example if "john" and "Robert"...

I would like to know, if QGIS (or different software) has a method, how to extrapolate raster values to larger area (outer boundary). I have a boundary(.shp), which is 40 m far from the edge of raster. I want to fill the space between raster edge and polygon boundary with values extrapolated...

I'm using ArcGIS 10.3 and the "Legend Wizard" does not offer me a method to include symbol size within my legend. I saw a similar question from a few years ago, but the solution will not work with 10.3. Thank you. أكثر...

I am using QGIS 2.12 in an Archaeological setting. I have populated a layer with features that represent burials and I have the intent for symbols to appear in the burial polygons to represent the type of artifacts(shell beads, types of pendants, etc.) found in them. I have 6 different items I...

I am using windows and I downloaded osmfilter and osm converter from here and here but when i run the executable nothing appears on the screen and the command mentioned in the aforementioned links like: ./osmfilter --helpare not getting reconised by the computer please let me know how to...

The Lidar News Today eNewsletter has just been published with the latest news items from a holiday-shortened week. We are still looking for more entries in the Lidar Art charity contest which will... Click Title to Continue Reading... أكثر...

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In my Plugin I take the polygon where my mouseclick is inside.According the mouseclick i define a +200 Meter rectangle and take allfeatures inside.How can i combine a list of lines and split my polygon of interest? from qgis.gui import QgsMapToolfrom qgis.core import...

I have a selection in vector point. I would like to do random sample from it. Here is my selection code: selection=layers_canvas[0].getFeatures(QgsFeatureRequest().setFilterExpression(u'"fitofissio" ILIKE \'%Vereda%\''))layers_canvas[0].setSelectedFeatures([s.id() for s in selection])I don't...

Does anyone know were the processing menu moved in QGIS 2.4? Specifically I am trying to install the Lastools box for QGIS following these instructions. http://rapidlasso.com/2013/09/29/how-to-install-lastools-toolbox-in-qgis/ Thanks أكثر...