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I am currently creating a polyline shapefile and need to split a line so as to add in a new off shoot. Would anyone happen to know how to split a polyline in QGIS? I have tried the split features tool in the advanced digitising toolbar with the following result. It is split at the node but the...

I am a first year Geography masters student. I would like some help or some input on any thesis ideas relating to illegal drugs. I have thought of a few ideas, for example, looking at making a GIS model on illegal drug vulnerability, looking at the effects of illegal drugs on a city, a Marxist...

I am trying to make a map using QGIS but I cannot join table data to features in QGIS. In ArcGIS for Desktop you just open the folder and then join the tabular table with the spatial data table. Does anyone know how to join table data to features in QGIS? أكثر...

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I am looking for a rather large DEM --- on the trillion cell scale --- to run some tests on. So far, I have found: 200 billion cells: The SRTM Global Dataset 30m DEM 120 billion cells: The National Elevation Dataset 10m DEM (higher resolutions have incomplete spatial coverage) 70 billion...

I just intalled Spline plugin But then it is not activated on the toolbar What can I do right now?I use QGIS version 2.10.1-Pisa. Windows 7 x64bit. أكثر...

Portland health technology startup Carevoyance, will present a workshop at SXSW titled "Telling Stories with Interactive Story Maps.". أكثر...

Esri data calculates that Trona had 1,883 residents in 2010 and has 1,904 residents today, down from a peak of about 6,000 decades ago. أكثر...

“We are much more efficient with GIS Cloud as all our clients have access to the same data at the same time. Given that we are primarily at photogrammetry company, much of our datasets are very large rasters that require specialized software and hardware to view. Our clients can now login to GIS...

The ozone hole over Antarctica grew relatively large and deep in 2015. أكثر...

In R using the raster package, you can create box plots from two rasters (x and y) like so: boxplot(x,y)where: x = Raster* objecty = If x is a RasterLayer object, y can be an additional RasterLayer to group the values of x by 'zone' Which works perfectly when I want to group the values of x...

I am building a spatial view using SQL Server Management Studio 2014. One of the tables I am using to build this view has field names that are not compatible with esri; the field names have slashes, hyphens and spaces. Is it possible to rename the fields of the view being created as the view is...

This video covers how to use the ArcGIS JS App Generator to quickly scaffold an application with testing and build tools provided. This way you can quickly get an application up and running without having to worry about basic setup and application structure. The post Using Yeoman ArcGIS JS...

import arcpy, os mxd = arcpy.mapping.MapDocument(r"c:\users\oberetey\Desktop\cc\gis\shapefiles\TESTRUNucage.mxd") df = arcpy.mapping.ListDataFrames(mxd, "age")[0] outpath = r"c:\top\output\\" finalPdf = arcpy.mapping.PDFDocumentCreate(outPath + "UC_age.pdf") if arcpy.Exists(finalPdf)...

I am trying to understand what is the effective accuracy of a georeferenced image and how to attach a standard to the georeferencing process which can be used for future reference. To explain further, I am trying to assess what kind of RMSE would be acceptable when for example georeferencing an...

QGIS server continues to grow with an active community and expanding user base. Besides new styling features shared with QGIS desktop, new services have been added continuously. OGC WFS (Web Feature Service) and WFS-T were the first additions to WMS, recently followed by an OGC WCS (Web Coverage...

I created a table where I have a list of town names in rows and company names in headers. The number of times a company operated in a town is shown where the town and company intersect. I am trying to take the sum of the number of times all companies operated in the town through the rowsum...

Walgreens has used GEO technology for close to 15 years for market planning. This via Fortune Magazine… More recently, however, the company has endowed that visual information with location-specific data—and published far more broadly, so that store managers and its corporate real estate team...

I'm facing weird random tile selection issues (like floating precision causes a wrong tile to load) when using some existing static tile data with mapbox-gl-js. I'm therefore searching for an example or tutorial for creating a tile set for usage with mapbox-(gl)-js. It seems to be some kind of...

I have a series of points that mark the edges of excavation units, I would like to create a layer of an outline connecting the points. The end goal is a layer displaying a grid of the excavation units. I've tried the points-to-line feature, but the only success is creating horizontal lines using...