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Reading the solution to PostGIS > Intersect two circles. Each Circle must be built from Long/Lat degrees plus radius got me thinking. How can I graphically display a SQL query? It doesn't need to be cartographic quality. A sketch for debugging purposes would be sufficient. For example, this...

I'm having difficulty troubleshooting why a number of my mapfile layers aren't rendering. I'm a GIS noob, so I'm probably missing something obvious and apologize in advance; I just don't know where else to turn to. I built a map project in QGIS and arranged the layers how I'd like; everything...

What is the current support QGIS offer with geoPDF files? Can a user open one of this files? Can geoPDF layers be extracted? أكثر...

I'm looking for basic political borders for the province of Quebec, as well as property parcel data and topography. Any suggestions for inexpensive/free data? أكثر...

Instead of going through a server to publish an arcgis web service hosted layer, I want to go right from my local machine to AGOL so that my server is NEVER exposed. I want to eventually put this File GDB into Collector. I have credits to use, but not many. I zipped the .gdb and uploaded...

I'm currently studying for a Msc in GIS. In my assignment I have been asked to produce a model, export that model as a script file and then run that script as a stand alone in IDLE. So I have created the model in model builder and exported it as a script and have even had a go at cleaning the...

I just created a points Shapefile, with 300 points. Using ArcGIS Desktop 9.3 I now need to label all of them numerically. Is there a way of labelling all of them, instead of me going to the attribute table and label them manually? أكثر...

In postgis I have 2 layers:'lines' (multilinestring, public, gid, geom) and 'polygons' (multipolygon, public, gid, geom). I try to find how to convert them to multipoint (or point). I suspect that ST_CollectionExtract...

I am wondering if there is a way to detect when a user clicks the "Printout" link after using the print task in ArcGIS Javascript 3.14. I have set up many custom options in my mapping application where I ended up using a "Prep Map" button to recreate the print widget based on the custom...

I have a map of zipcodes in San Francisco that I plotted on CartoDB.The CartoDB view looks about like I expected: But when I had CartoDB generate an SVG, the proportions are way off. I took the same data to QGis and got the exact same distortion when I output an SVG. What on earth is...

It seems like it would help a great deal to store as much of the image as possible on the GPU for panning and zooming etc. We deal with a lot of very large images. Many range from 8 gigs to hundreds of gigs in size. At home I've got a 40" 4k monitor and a GTX Titan with 12 gigs of video...

I need to create a raster data set from a table of given elevations to be able to compute slope and flow direction. I already know how to do the spatial analysis of the slope and flow, but have only ever done it with downloaded DEMs. أكثر...

Seasonal snowpack in the Sierra Nevada depends on whether a winter is wet or dry, and 2015 shaped up to be exceptionally dry. أكثر...

I am doing a household survey in Kenya, and I need to ensure that my survey team visits every house within a given area. I've been going to google maps and right-clicking on roofs to get coordinates via the "what's here" option. This is really an inefficient use of time. I'd prefer to have a...

The Esri Startup Program equips startups and emerging businesses with the tools to build location and mapping analytics capabilities into their products. أكثر...

I am trying to figure out how to change Openstreetmap country borders color/thickness. I've set up a tile server using OSM data, PostgreSQL & Mapnik. The default mapnik style is used. There doesn't seem to be a straight forward way to do it globally. I'm a newbie, your help is appreciated...

I am wondering if something like this: http://esri.github.io/gis-tools-for-hadoop/ exists but for QGIS. Or if these tools be adapted for QGIS. أكثر...

I am testing the examples that are provided on GitHub. All of my dependenicies are installed and the code runs without errors, but I am obviously missing something as all I have is a .py file. Where is the map actually displayed and how? Edit: Figured this out; I didn't realize that...

The Google Earth Engine website lists a number of featured datasets. When I click on one of the time lapse datasets, it opens in my browser (Firefox on Linux), but for the "Precomputed datasets", I get "The Google Earth Plugin is currently only available on Windows and Mac OS X 10.6+.". That's...

By Makara Rumley About the author: Makara Rumley, JD, is the Senior Advisor to the EPA Region 4 Regional Administrator. Her interest in the links between human rights and the environment had its roots in her work with Amnesty International, the National Geographic Society, and GreenLaw. It’s...