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I have drawn a circle on google earth pro in such a way that its radius starts from earth center 0,0 (lat/long) and ends at 0,90 (lat/long). This circle divide the earth into two equall halfs as shown in image. It is in line shape of length 39,999 km. Then I have converted this circle in...

I stored my point date in geometry format with SRID 4326 supposed EWKB (data looks like this "0101000020E610000071F1A611E9392640AECD10D8E68C4A40") = way geometry(Point,4326) I want to have the coordinates in geography format. So what to do? So far I created another column for it: ALTER TABLE...

Please pardon my ignorance if this seems trivial, but I am very new to using openlayers3 for map rendering. I am rendering a Tiled layer over the world map layer for the KML data from CGI mapserver 7.0.0. The KML layer tiles come up fine on display but when I click on the layer and call the...

We are trying to work on a project, and the requirements for delivering the product to the company is in DXF files because they use Autocad and we should meet their standards. On the other hand we don't use Autodesk products. I want to know what are the main issue of generating DXF file...

I want to download NDVI or any map GeoTiff in USGS when it update. Someone please suggest the best way to get it. أكثر...

Earlier this week we showed you our historical imagery density map. Looking at the map a number of hotspots are immediately apparent. However, many of these hotspots result from anomalies in the way the Google Earth plugin reports the information as well as the settings we used when collecting...

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As a current geography major at Penn State, I hand draw maps for fun in my free time and was curious what you all thought of my latest map of State College, PA. The photo is not the greatest quality but I think that you should still be able to see the map pretty well. Also the map is about 36...

I am a beginner in the world of GIS. I have one table polygons with each polygon having north-east and south-west coordinates. And for every polygon, I need to find area of overlap with other polygons (e.g. 70% area of polygon A overlaps with polygon B). I know the ST_Intersects function...

I want to insert python tuples into an arcgis table. As you can see below pylist has some empty values (' ') which is basically 'String' type. These should be inserted as NULL in arcgis table field. The field has type Long. One way is to replace all (' ') values to 0 but that is not same as...

As i am unable to write a query on vector layer in openalyers 3. On raster layer i am able to restrict layers using CQL_FILTER, but unable to add styling and overlay it on a bing map. Looking for a solution. Any help regrading this would be greatful. أكثر...

I am interesting in downloading Landsat 8 rasters to an Amazon EC2 instance and would like to know how to do it. I already install USGS Bulk Download but I do not know how to use it in terminal mode (so far I only use the Windows 7 version with the Graphic User Interface). أكثر...

Bonjour, pour mon mémoire de fin d'étude intitulé "rédaction carto topographique avec les outils open-sources(qgis)" J'ai besoin d'un document de l'IGN ou n'importe quel organisation similaire dont je peux savoir les normes exactes de rédaction cartographie topographique..par exemple...

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This article is a continuation of the article “Heatmap and Interpolation: it is easy in OpenWebGIS” about creation of Heatmap and Interpolation with the help of OpenWebGIS interface. We are now describing the process of creating a heatmap, based on any point layer, using JavaScript, OpenLayers...

Is there any way to dissolve shapefile but keep attributes fields in the same time. This is how I want to retain fields: I have two fields I want to conserve in a shapefile. The first column is Net_ID with long type, and the second column is Geology with string type. I would like to dissolve...

I know that I can write custom text to message bar with the QgsMessageBar.pushMessage() method. But if I understand the documentation right, there's no room for variables added to a string where they are escaped (like in print() function), and I get "arguments did not match any overloaded call"...

I am unable to call and pass values from a separate application(.NET application) to a opengeo suite applciation. As i am given with a (url :- http://localhost:9080/ ) generated in command prompt [suite-sdk debug /portal/Application].Any help regarding this would be greatful. أكثر...

There are three methods to convert the output of a Make XY Event Layer to a Feature Class: Copy Features Feature to Point Feature Class to Feature Class Which one is the fastest method? I need to convert a huge amount of points stored in a csv table (1,5 GB file) and I wonder what's the best...

The Census Data Mapper is a web mapping application of the Census Bureau used to create instant web maps out of the Census data which are stored in the Census databases. I was wondering what tools are they using to make that service? For example, what mapping server, what client, and so on...