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The GIS Guide for Elected Officials Paperback – January 6, 2014 by Cory Fleming (Editor) The GIS Guide for Elected Officials is a go-to resource for government officials who want to better understand how the power of GIS can be leveraged to answer their constituents' questions...

ArcPy and ArcGIS – Geospatial Analysis with Python Silas Toms February 2015 Use the ArcPy module to automate the analysis and mapping of geospatial data in ArcGIS About This Book Perform GIS analysis faster by automating tasks, such as selecting data or buffering data, by...

I'm developing a QGIS plugin that fully run spatial queries with PostGIS. Actually I developed all spatial queries wish need some adjustment. I'm looking for some ressources or documents to know how must I proceed. أكثر...

I have a question concerning label placement in QGIS. I'd like to rotate every label by 180°. Therefore, I set the rotation value to 180 (I've tried different ones as well as different variable types) according to the description: I also applied every combination of "Preserve data...

In leaflet, I have a class that extends L.GeoJSON: L.MyLayer = L.GeoJSON.extend ({ initialize: function () { this.markers = []; ... I redefined the pointToLayer method to create markers for points: pointToLayer : function(feature, latlng) { var marker = L.marker(lat...

I have tried to create a slope map using ASTER 30m DEM obtained from internet. But when I use it to create (using ArcGIS 10 & 3D Analyst) a slope raster, the output is only 0-89 range. My projection is KANDAWALA__CEYLON BELT METERS. I have tried to use the original projection of ASTER global...

I asked the question below on StackOverflow, but haven't received any feedback there yet: I have precipitation data from the PRISM Climate Group which are now offered in .bil format (ESRI BIL, I think) and I'd like to be able to read these datasets with Python. I've installed the spectral...

I'm creating a script tool and using the SelectLayerBy Attribute function (below), arcpy.SelectLayerByAttribute_management("cities_lyr", "NEW_SELECTION", '"CRIME_INDX"

This question already has an answer here: Runtime error : ERROR 000358: Invalid expression using SelectLayerByAttribute in ArcPy? 3 answers My script runs perfectly for feature classes, but...

I cannot for the life of me persuade SelectLayerByAttribute to work (I need to automate this for a complex script). Working in ArcMap's python console on already loaded shapefile, the format below: import arcpy from arcpy import env arcpy.env.workspace = r"C:/Users/.../working"...

I'm trying to use an integer value in a WHERE clause (looking at an integer field). expression = "'SERVICE' = 'Service' " expression = expression + 'AND ' expression = expression + "'GPS_TIME_TOTAL' > " + "%d" % 10...

I need to import a climate map downloaded from WorldClim into Matlab for manipulation with the mapshow command. I am comfortable reading in ASCII grid data into matlab, but this format is not available from this website. Available are the ESRI format with the file extension ".adf" and generic...

We are interested in using a dataset created by a fire lab. The data is in ARC BIL format. Is there a way to convert this into netCDF? أكثر...

A couple of days ago Google introduced some new layers to Google Earth in honour of Google Earth’s 10th anniversary. Yesterday we looked at the ‘Satellite imagery updates’ layer. Today we are looking at the ‘Earth View landscapes’ layer. The ‘Earth View landscapes’ layer highlights the locations...

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I have created python script tool in arcgis 10.1 as below. I am trying to take input parameter and passing to select statement. There is error when i execute this tool. import arcpy from arcpy import env env.workspace = "Database Connections\sc_dev.sde" name =...

I have 300 polygons in a single shapefile, I want merge some polygons together, when I merge two polygons the attribute does not come total count of two polygons, What I need is, when I merge two polygon the attribute value has to add together and the total value has to come in merged...

Bonjour, j'ai une couche de lignes simples (de type oursins) et je voudrait raccourcir tous les objets d'une certaine longueur à chaque extrémité. Je n'ai pas trouvé mon bonheur dans les fonctions de géotraitement ou dans la boite à outils (mais comme c'est en anglais, je suis peut-être passé...

Lining Up Data in ArcGIS: A Guide to Map Projections Paperback – February 18, 2013 by Margaret M. Maher Lining Up Data in ArcGIS: A Guide to Map Projections is an easy-to-navigate troubleshooting reference for any GIS user with the common problem of data...

I tried to view a GML file and I have a problem with viewing of polygons from a feature type ps:ProtectedSite with QGIS. This feature contains a MultiSurface with a surfaceMember with a CompositeSurface with several surfaceMembers, which contains each one a polygon. QGIS logs: OGR[3]...