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Questions tagged [gis]

A Geographic Information System (GIS) captures, stores, analyzes, manages, and presents data that are linked to location(s). The GIS Stack Exchange should be considered for questions with this tag.

According to Wikipedia:

A geographic information system (GIS), geographical information system, or geospatial information system is any system that captures, stores, analyzes, manages, and presents data that are linked to location(s). In the simplest terms, GIS is the merging of cartography, statistical analysis, and database technology.

There is a Stack Exchange site devoted to Geographic Information Systems.

6555 questions
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ArcGIS MapControl and Ms Access delay map re-draw?

This pertains to embedding ESRI MapControls into Access Database Forms. I have two access files, split into a frontend and backend. My backend is also a PersonalGeoDatabase that ArcGIS uses to store a feature class for display on a From embedded…
slawley
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Set field value in a Featureset Dotspatial

I am creating a shapefile using DotSpatial library in Microsoft Visual Studio and C# programming language. The shapefile consists of a Polygon layer. Each polygon in the layer needs to have a specific fertilizer value. As far as my understanding…
Umar Dastgir
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Is there some algorithm to match a polygon from a candidate set of polygons?

define a set of polygon A. the input is a polygon B. I have to output a set of Polygon R, which is the subset of A, and if I union all polygon in R into a polygon C, C and A should be as similar as possible. Just like figure below:
WendellYueng
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overlay flux footprint over a map

I need to overlay a plot over a map (it can be from ggmap or from a file in my pc - not a shapefile). ### Here is the map library(ggmap) library(RgoogleMaps) lat = 49.12978 lon = -122.985 center = c(lat, lon) bbmap <-…
Brenda D'Acunha
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(N)Hibernate - is it possible to dynamically map multiple tables to the one class

I have the situation where i use GIS software which stores the information about GIS objects into separate database table for each type/class of GIS object (road, river, building, sea, ...) and keeps the metadata table in which it stores info about…
zappan
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Unable to retrieve map tiles at high zoom level (i.e. zoomed out) with Matplotlib/Cartopy/Python

I am creating a mapping application with Python and Cartopy, and attempting to use open-source map tiles for backgrounds, to have more options than the default Cartopy map. It works perfectly for maps that are zoomed in fairly close, but when I try…
D. Lef
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Mapproxy shows tiles in wrong position

I am using Mapproxy to display map http://maps.stamen.com/toner/#3/49.78/-4.04. But the tiles are shown in wrong position. For example: Map without zoom: Map with one level zoom: More zoomed, the image looks even more odd. Mapproxy…
an9l
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How to translate a polygon in GeoDjango?

I have a Place model which has a polygon field: from django.contrib.gis.db import models class Place(models.Model): area = models.PolygonField() I want to translate the area field of an instance of this Place model. Here is how I am doing it…
Jahongir Rahmonov
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Is anyone interested to set up a community for GeoDMS?

GeoDMS is a fairly obscure geographic object-oriented programming language written in C++ by Object Vision (http://www.objectvision.nl/geodms/). I'm using it to analyse location-dependent renewable energy options, with or without the Vesta model,…
Otto
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ggplot, ggsave & coord_map/quickmap: how to save large spatial objects and get the projection right?

I have a largish polyline shapefile (Bavarian rivers, which can be accessed here) which I would like to plot and save via ggplot. This can easily be done via e.g. this code: library(ggplot2) library(rgdal) library(sp) library(rgeos) riv <-…
M.Teich
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Delimit voronoi diagram with map boundary in R

I have a set of lat and lon points I managed to plot a voronoi diagram with. I would like to overlay the voronoi diagram on a shapefile of Singapore and delimit the voronoi diagram with the boundaries of the map. The voronoi diagram I have…
jsong005
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What is a good SDK for GIS on Windows Mobile?

I'm looking for suggestions for a GIS SDK on windows mobile. It needs to be able to display ESRI Shapefiles efficiently.
TSM-ATT
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Performance limitations with OpenLayers 4.6.5 using several layers

I am currently working on a GIS holding a large amount of layers (up to 20 / 30). The map is rendering tiles in a really slow way. It was previously written with OpenLayers 2.x, and we didn't face this performance bottleneck. Our layers are using…
nioKi
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'rasterio._io.RasterReader' object has no attribute 'xy'

I'm trying to pull coordinate and pixel value data from a .TIF using rasterio. In recently updated documentation (April 2018) there appears to be a .xy() function to get the spatial coordinates of a pixel, with an example: >>>…
Gbstox
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Openlayers 5: Modify interaction, how to get vertex pointed to

When modifying a feature, there is the option to delete a single vertex. According to the docs it says: removePoint(){boolean}: Removes the vertex currently being…
Chris
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