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Our GIS dept is trying to figure out if the USNG is worth using for our mapbook & other local government level applications. So the question - Does anyone here use it at the county level? What do you use it for? And what are the pro's & con's?-Thanks in advance أكثر...

I am working on a plugin for QGIS (2.10.o-Pisa) and want to clip a raster dataset based on coordinates. I originally develop the plugin in Window but now when I try this on Linux (Ubuntu 14.04) it gives me errors. Here is what I do: subprocess.call("gdalwarp -dstnodata -9999 -q -overwrite -te...

I built grass70 from source on Ubuntu 14.04 desktop using the documentation at the Grass Wiki. I can initialize grass70 from the command line, and the startup GUI appears to select my project / mapset. When I select "Start GRASS session", the grass gis logo page briefly appears and then...

I am trying to compare the results of a geocoded table using different locators. When I try to use certain locators, an error message pops up saying that the locator needs repair. When I select the same spatial reference as the lion file I am using, the "ok" button is grayed out. I did not...

I have received an excel file that contains data on grid cells of 500X500m. The geographical information looks like this: 13843145006371500. The first four digits is the code for the municipality and the others are the xy-coordinates for the south west corner of the grid cell. Can I use this...

I have a pre-tiled Slippy map data source. How can I render a non-tiled raster image for a given bounding box, without having to add each PNG file and its extents manually in something like Mapnik or GDAL? أكثر...

When I export SVG files from QGIS using the Print composer the stroke widths become a lot wider when importing into Adobe Illustrator. It seems like the stroke width in the SVG translates differently in Illustrator compared ti Inkscape. Example A line in QGIS with the width 0.26 mm is shown as...

First of all, we remind you that you can attend our Map Portal webinar tomorrow (Thursday, October 8th) and find out more about its numerous applications in creating public maps for cities and governments, consultants, NGOs and others. Register here Secondly, our Special Offer for Map...

Did you know that the SHP FDO provider included with MapGuide Open Source 3.0 now supports the family of FDO APIs introduced with RFC 23? What this means is if you have a Feature Source that connects to a directory of SHP files, you should see dramatic performance improvements in walking...

By Administrator Gina McCarthy I’m thrilled to announce that our EPA colleague Jacob Moss is the winner of one of this year’s prestigious Samuel J. Heyman Service to America Medals, also known as the “Sammie” award. Sammies are awarded each year by the Partnership for Public Service to a small...

<div dir="ltr" style="text-align: left;" trbidi="on"> In OpenWebGIS a new function has been created to manipulate images. <div style="text-align: justify;">With the help of this function, you can calculate and get the height (height and altitude) of each pixel of your image. The calculation is...

I have downloaded TRMM daily precipitation estimates for Indian Sub-continent from 1988 to present. I see that there are a lot of missing data days. I was wondering how can I possibly detect the daily missing TRMM files automatically without manually skimming through the downloaded data? Is...

I am having some trouble with the the_geom column and the the_geom_webmercator column in CartoDB. I have some SQL (which I modified from http://bl.ocks.org/andrewxhill/8695515) in which the the_geom_webmercator column is changed, but the the_geom column is not changed. This means that the...

I use Microstation v8. I have to make a building (solid) from existing property register (on the base level) cut on the top by the roof (which I have already). To sum up - I own the property register (ground level) and sloping/flat roofs' shapes (top level). I do following steps: 1) Copy the...

We have a proxy server which I've added to QGIS, but when I load openlayers, I get a grid with lots of questions marks, yet the watermark is supplied; any ideas? Fiddler doesn't show anything out of the ordinary. أكثر...

I want to display length according to part 1 Image. but now its making like part 2. I am using below code. import shapefile from PIL import Image,ImageDraw, ImageFont from qgis.utils import iface from PyQt4.QtCore import QVariant import math import psycopg2 try: conn =...

Jack Dangermound tells you how GIS is being used to create the furture. أكثر...

I am trying to figure out the whole process behind creating a 3D elevation map of a region that I have downloaded ASTER DEM data for. Any help with this would be much appreciated! Thanks أكثر...

I have shapefile with lines that shows surface water runoff. I need to clear and simplify these lines by condition that if some lines are near by other and has similar running, this lines has to be deleted. I'm using Python 2.7, ArcMAp 10.2 and Windows 7. I have tried some solutions like...

By Christopher Grundler, Director, Office of Transportation and Air Quality Last month,*Volkswagen admitted to EPA and the California Air Resources Board*that the company employed a sophisticated device to cheat U.S. emissions standards in certain diesel cars, including the*Audi A3,*Beetle...