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1 answer

What is the difference between Vector and Raster data models?

From: http://support.esri.com/en/knowledgebase/GISDictionary/term/vector%20data%20model vector data model: [data models] A representation of the world using points, lines, and polygons. Vector models are useful for storing data that has discrete…
Aquarius_Girl
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6 answers

Documentation for ArcPy site-package?

Has anyone found any informative documentation about Esri's ArcPy Python module?
user337
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4 answers

Applying four colors theorem in polygon map using ArcMap

I need to apply the four colors theorem in a polygonal shape in a way that I do not need to choose manually each color to put in each region. I wish to knows if there is any extension, plug-in, script or data base that may be used with ArcMap and…
NaN
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2 answers

How to create contiguous area cartograms in QGIS or R?

Here is what I want to achieve (on the right): I am looking for a tool or a method to transform a shapefile (with QGIS or R) into this form. And please be aware: It's not just clipping a hexagonal grid or a grid of hexagons! Each hexagon should…
Chrugel
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21
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5 answers

How to create a label combining different font sizes or types?

I would like to place the elevation-number of a point in a different front size and centred under its name: Is that possible? (That is my actual labeling: label || '\n' || elevation)
MartinMap
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4 answers

How to calculate Network Service Areas in QGIS?

Is there any way in QGIS to apply service area buffers e.g if I have a point on a map I wish to show the service coverage of 1 mile, 2 mile, 3 mile, breaks using the road network?
Joseph
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21
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2 answers

Finding Georeferencer in QGIS

I'm using QGIS 3.26 and I can't find the Georeferencer. I've basically looked everywhere. It should be in the raster section, but it isn't there. I checked all of my plugins if there was anything, but there wasn't anything, and I even searched it up…
homebrwed
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21
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7 answers

Installing PostGIS on Windows

I want to create an application platform based on PostGIS data. I read the documentation where I saw the prerequisite to install GEOS, GDAL and Proj4. The main problem is I am using windows platform. Can anybody refer me where I can get full…
Devils Dream
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5 answers

What are the "must read" academic articles every GIS professional should read?

There was a related question a while back that dealt with the top GIS blogs, but I'm also very interested in "academic" sources of GIS information. I'm currently updating my repository of information and am also considering some new journal…
Radar
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21
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7 answers

How to improve rendering performance of a very large shapefile?

I have a polygon shapefile that has a 100MB .dbf, and 500MB .shp file component. The reason it is so large, is that it is classified as a landbase for a whole district. Everytime I view the file in ArcCatalog, or ArcMap, and move the view window…
youzer
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21
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6 answers

Detecting "lack of movement" on GPS device

We're using a GPS tracking device mounted in vehicles and later display the movements in our application. We're having a small issue however with vehicles when they are NOT moving. Despite standing still, the GPS device will send information with…
MBender
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21
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1 answer

How to Split a Concave Polygon Into Convex Polygons in Arcpy?

I'm looking for a tool or algorithm to detect concave polygons and split them into convex polygons. Like explained in the picture, the blue polygon is split into A and B polygons I'm using Arcpy under Arcgis 10.1
geogeek
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3 answers

How to import KML file, with custom data, to Postgres/PostGIS database?

By custom, I don't mean a different structure of KML file, but in section, I have data with HTML tags of this kind:
sgy
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21
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1 answer

Is there a way to add system date or time in print composer?

Is there a way in the Print Composer of QGIS to create a label that will automatically update the date (systems date) instead of having a label that you have to manually have to update?
geosmiles
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Is Geoslavery complicity a violation of GISP code of Ethics?

Would developing applications to support Geoslavery be considered a violation of the GIS Professional (GISP) code of ethics ? Human tracking devices, however, introduce a new potential for real-time control that extends far beyond privacy and…
Kirk Kuykendall
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