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I am a newbie in AutoDesk AutoCAD 2015 and have a problem at hand. I have a drawing which has a known Universal Transvers Mercator based control point but for the drawing to be georeferenced in ArcGIS I need two points because it is rotated and scaled in mm. An expert suggested to use...

I'm rendering maps into SVG files, and I'd like to put geographic metadata into those files, as described in section 7.13 and 7.14 of the SVG spec, but I'm uncertain about how to interpret the element. My primary use case for this is to eventually get the information into a GeoTIFF file. Since...

Here's my first MapLift contribution, a map accompanying the Wikipedia article on Franklin's Lost Expedition (replacing the one currently there) Some options I'm still contemplating: Using a Natural Earth terrain backdrop instead of a plain area fill. Cropping it closer, especially on...

I want to calculate the maneuver details (turn-left, turn-right, etc) from the coordinates array returned by google roads API (I'm using JavaScript). I tried to calculate the degrees between two coordinates using this code: function radians(n) { return n * (Math.PI / 180);}function degrees(n)...

I am using ArcGIS 10.2.2 and ModelBuilder. I have a set of model that work and have been tested.I notice that if I run through the models one after another the open dialogue becomes very slow to open and sometimes freezes. However if I close and re-open ArcCatalog before running, then the model...

After creating a global map of historical imagery density last week, we have been experimenting with higher resolution versions for a small area. High resolution historical imagery density Latitude 0°-15° Longitude 0°-20°. As you can see above, there is a curious pattern of vertical and...

Hello guys Thanks for the support. I am supposed to sit for an interview for the post of GIS analyst. Any suggestions on how to prepare for it? Thanks in advance. أكثر...

I have a Geoserver running on Ubuntu Linux 15.04. Layers that I upload look just fine on any Linux machine, however, when I test my application on a Windows, maps look like this: Do you have any idea what's happening here? أكثر...

I work with QGIS 2.10.1 on Windows 7 (x64). I have dissolved polygons from an attribute value and the polygons geometries being not perfectly joined together, I get some 'garbage' nodes I need to delete. I have tried to edit the layer and using nodes tool, selecting and deleting the nodes, but...

I'm wondering if there is a way to find the minimum value of a group within QGIS? Basically I need to find the minimum distance of each unique value in a table of about 5000 records. I can do the analysis in excel using vlookups, etc, but wondering if there is a method in QGIS that will allow...

Bonjour à Tous. J'ai vraiment besoin d'aide. je dispose de ARCGIS 10.2.2 . j'ai traité des images de MODIS d'années différentes. j'ai converti chaque image en polygone après traitement. Maintenant je veux superposer ces deux shape pour voir réellement l'évolution de la dégradation. Merci et...

Bonjour , J'ai la malchance de travailler dans un environnement windows . Windows 8 actuellement et Qgis2.8 . Mais windows 10 arrivant je me demande s'il posera des problèmes de compatibilité avec Qgis ou la version 2.7 de python . Si vous avez des informations la dessus je suis intéressé...

I am trying to access Postgis functions in Restful web service JAVA. I am using netbeans 8.0.2, Glass Fish, J2EE 7 to create web service, PostGres 9.2 and postgis 2.1.1. Connection to postgres is established successfully and I am able to read postgis table data successfully in JSON and XML...

I'm making a map on ArcMap and I converted the legend to graphics in order to manually manage my symbols and texts. For instance I want to increase the size of all the points in the legend to the same value. If I ungroup all elements I can then select all points one by one keeping control key...

I know similar questions have been asked several times, but none of the solutions seems suitable for my problem or don't work.. I computed flowlines using the r.flow tool from GRASS GIS, then I export these using v.out.ogr which gives me the files flowlines.dbf, flowlines.prj, flowlines.shp...

I have just come across the WRF Hydro GIS Pre-Processing Tools for the first time. The version I am looking at is 2.2 and its documentation says: The processing workflow for creating WRF-Hydro routing grids is available to users as an ArcGIS Python Toolbox. Python toolboxes were...

I am using the sample code (draw a polygon on the screen) provided by Esri but it seems I cannot start the drawing from a location I want, every time it starts at wherever the function(or tool) located on map. Anybody know how to draw a polygon as desired? Any example there...

i want to extract aerosol optical depth on land using modis it seems like I need a value from one of these parameters between Corrected_Optical_Depth_Land and Corrected_Optical_Depth_Land_wav2pl but don't know what one to use can anyone please tell me the difference between these tow or if it...

I'm trying to convert a line shapefile to a raster image at QGis, but my attempts have been unsuccessful. I've tried to use Raster/Conversion/Rasterize and SAGA/Grid - gridding/Shapes to grid, but to no avail. Is there any other way to accomplish this? أكثر...

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