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Suppose a script has a variable number of outputs, which may or may not be produced depending on settings: ##Input_layer=vector##Output_1=output vector##Produce_output_2=boolean##Output_2=output vectorfrom qgis.core import *def create_my_output(path): #...

In an arcpy for the intersect_analysis function, certain syntax works and others don't. What is the reason for this? Works: arcpy.Intersect_analysis("'D:\\Program Files (x86)\\ArcGIS\\data\\uscities.shp' #;'D:\\Program Files (x86)\\ArcGIS\\data\\riverbuffers2.shp' #", Cities_Near_Rivers...

I want to re-project and resample a netcf file but I am getting a usage problem: gdalwarp -t_srs EPSG:3410 -ts 1383 586 NETCFD:"C:\data\product.nc":gsfc output.tiff My file can be downloaded from here:https://copy.com/q7AK42bL4eLcNyWE أكثر...

The team at CartoDB have recently(last few days) made some useful updates that now allow public visualisation maps to reference data in private tables. The change has only been made in the last day or two to the public UI. Is it possible to run a query on the maps visitations? I have a bit...

The ST_length() function returns the length of a linestring but not in meters. Is there a function like ST_Length() but in meters?. أكثر...

I want to load the postgis layer to qgis canvas. I am using the following code but it is not loading the layer in canvas. sql = "(SELECT * FROM table WHERE id = 20)"uri = QgsDataSourceURI()uri.setConnection("host", "5432", "databasename", "user", "password")uri.setDataSource("public","table"...

I had setup cartoDB locally in my server. I am very curious to know about the free storage space alloted (in means of mapviews, tables, Data Storage) for using cartoDB from my own server for private views. And also, below is a snapshot of cartoDB storage statistics after setting in my own...

I want to use a Python script that executes Grass commands via os.system(). This of course, has to be executed from a running Grass session. However, when I use the OSGeo4W Grass, it does not find all imported packages as it falls back to its own/default Python distribution. How can I enforce...

I try OpenLayers.Control.GetFeature to get feature from WFS layer : function editTool() { var edit = new OpenLayers.Control.GetFeature({ protocol: OpenLayers.Protocol.WFS.fromWMSLayer(Vidagis.CurrentMap.map.layers[1]), click: true, box: true...

Kyle Walker, assistant professor of geography at Texas Christian University created an interesting project. He took data about immigrants from the latest 2010 Census and mapped region or country of origin of each and every of them.*The effect is a dot-density representation of the US immigrant...

For*students interested on geospatial technologies, we selected *10*Online GIS degree*and*GIS Certificate programs : 1) Certificate programs in GIS and Geospatial Intelligence at Penn State University (U.S) : The Department of Geography at Penn State offers multiple Online Geospatial Education...

I have several NetCDF files that I am trying to load into ArcGIS. I've tried both the "Make NetCDF feature layer" and "Make NetCDF raster layer" tools. In both tools, when I double click on the NetCDF file in "Input NetCDF file," the window showing my NetCDF files closes, and nothing else...

I have been trying to predict Land Use Classes in R using Random Forest and Caret packages. My area of interest is 4300km2 (raster dimension X 4109:Y2800). I am working with 4 multispectral Landsat bands. I was able to do the whole process and classify the target classes but some areas within...

SELECT seq, id1 AS source, id2 AS target, cost FROM pgr_kdijkstraCost( 'SELECT gid, source, target, cost FROM road_network', 26, array[1055,2013], false, false); i have getting the error message(ERROR: Error, query must return columns 'id', 'source', 'target' and 'cost') when run the...

I am really new to cartodb and have spent a number of hours trying to figure out the distinction between layers and sublayers. Specifically within cartodb.js. For example, I have a map with two layers that I created using cartodb. I then use cartodb.createVis to get at it from javascript...

I have been created Fishnet of 2KM X 2KM using ArcGIS 10.2 and calculated area and stored into the grid attribute as length field. Now I would like to know, how many grids are having high road density in an area. Kindly help and suggest. Thank You.. أكثر...

حلقة مفيدة جدا عن تطبيقات نظم المعلومات الجغرافية مع الدكتور حسن ربيع https://www.youtube.com/watch?v=LOFFnvvQpWk أكثر...

I am trying do add georeferenced aerial images (jpg files) to my QGIS. They do not install properly. I either get a grey rectangle or bands of colour (mostly blue) that appear where the image should be. Also, if I solve this problem, I then need to install all the images. Is there a quick way...

I am using ArcGIS Server Manager to create Web Applications (ASP.NET). I would like the customer to access has an option to export your vision to PDF or Image, or both. I would like to generate the file, keep up the zoom, pan, measurements and other iterations that the user made. It would...

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