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What are the practical differences between Moran's I and Geary's C for gridded datasets (e.g. temperature) on a continental scale such as USA? Which is more applicable? أكثر...

I have installed the JavaScript API locally to use in a developer environment with no internet connection. The issue I am encountering is when I attempt to view the sample service hosted by ArcServer I am presented with a blank white page. The sample service is visible when viewed in Desktop &...

I've been using QGIS for a while but since using QGIS 2 the OpenLayers plugin doesn't work for me on my home pc. (However, I have installed the same version at my workplace with success.) I have looked through other posts, and tried setting the crs and allowing on the fly but it doesn't work for...

I attempted to spawn a separate process from the ArcGIS ToolValidator script. Unfortunately, it launches another instance of ArcCatalog. What is going on behind the scenes that causes ArcCatalog to be launched, when I'm only trying to execute a second python script in a separate process...

I am currently planning the migration of a database from ArcSDE/ ArcMap to PostGIS / QGIS. The data is stored in raster catalogues and feature datasets. Is there an equivalent to feature datasets supported by PostGIS or do I need to group the layers by adding a prefix corresponding to...

I'm having a little trouble with the Python OGR API. What I am trying to do is get all the coordinates of each vertex of the outer ring of a polygon. This is what I have so far: import osgeo.ogr import glob path = "/home/woo/maps/" out = path + 'output.txt' file = open(out,'w') for...

Why does the route analysis take a longer path to reach the point when i click the solve button, even though I can see a shorter path with my naked eye? I'm trying to digitize again and make a new network dataset, but it's still same like before. Am I missing any steps during creating...

Trying out PostGIS 2.2’s ST_ApproximateMedialAxis capabilities today. I’m going to use it to label parcels. So here is my parcel fabric: And here’s what the skeleton of that fabric looks like: It get’s pretty interesting where the parcels are more complicated: more: Oh, the...

I've been dealing with problem for a while now and I want to know if I'm in the right track, basically I want to replicate this site functionality and so far I think it can be done with pgrouting although I still trying to make it work, is this posible? or there's any other tool to achieve...

I'm building a geoprocessing service that queries an SDE database (running on postgres) and returns results. I do a lot of development by calling the script from a toolbox in ArcGIS desktop 10.3. For some reason when I call the script below in ArcGIS desktop, it executes successfully the first...

Esri's Story Maps has caught the attention of CIAT's Decision and Policy Analysis Research Area. أكثر...

GIS gives the Highway Department a way to map and coordinate its traffic signs and sign maintenance. أكثر...

In QGIS, I'm using Difference (under the Geoprocessing menu) to subtract a complicated shapefile with plenty of features from another complicated shapefile. For 90% of the features, it works correctly. But for some, it ends up deleting the underlying feature altogether, instead of returning...

I'm using classic snapping in ArcGIS 10.1. At the scale (1:5,000) that I'm using to snap the edge of one rectangular feature to the edge of another rectangular feature, snapping seems to work fine. But when I zoom into the "shared" line, I begin to see a gap between the features. I thought...

This is Part 1 of 2 of tutorial using My Tracks & Google Earth on Android. If you found this video useful, don’t forget to Thumbs Up this video. Previously we captured our tracks in a town called Verner. As a disclaimer, I would like to warn all users to be sure you do not ... أكثر...

Happy 2016 all. Yes it has been a while and thanks for your patience. Like usual, at the beginning of every year, there are the promises to eat less, exercise more, climb Ventoux and blog more. Was listening to Feakonomic (When Willpower Isn’t Enough), and this initial post of the year is to...

I am running arcmap 10.2.2 but need to open an mxd saved using 10.3. I do not have access to 10.3. I have an arcpy tool which will do the conversion but it is not working from within 10.2.2. Does anyone know if it is possible to do this from within 10.2.2. I get an error message saying I do not...

Summary: Ann Arbor, MI – The U.S. Environmental Protection Agency registered a sea lamprey mating pheromone, 3kPZS, as the first ever vertebrate pheromone biopesticide in late December, 2015. Like an alluring perfume, the mating pheromone is a scent released by male sea lampreys to lure females...

New Years Eve Champagne Edition [View the story “#GISTribe chat #92 (2015-1230)” on Storify] أكثر...

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