Geographic Information Systems Stack Exchange Community Digest

Top new questions this week:

Sorting text column by numbers with letters

I have a text column. It's made up of the numbers 1, 2, 3 up to 1650, which are currently not in increasing order. However, it also includes text such as 520a, 639a, 639b, 639c. Sorting on increasing ...

qgis attribute-table text sorting  
asked by Alasdair 8 votes
answered by ian 7 votes

Where do I find CRS axis names?

When using the SUBSETTINGCRS argument of a WCS query, one needs to provide the axis labels in the subsetting CRS. This answer to GeoServer does not work WCS parameters "subsettingcrs" and &...

coordinate-system epsg naming-conventions  
asked by Skippy le Grand Gourou 5 votes
answered by user30184 5 votes

QGIS How are data points of the same value classified for Equal Count (Quantile)?

For example, I have 100 data points and am classifying them using the Equal Count (Quantile) method. I want to have 5 classes, and in the ideal situation I will have 100/5 = 20 values in each class. ...

qgis classification  
asked by tdgsysjrgv 4 votes
answered by Randcelot 2 votes

QGIS Attribute Table on print layout not sorting

I've added in an attribute table to a print layout and am trying to sort numerically ascending using Plot Order For some reason it doesn't change order whatever field I use to sort the items in the ...

qgis attribute-table print-composer sorting  
asked by HeyHoWheresJoe 4 votes
answered by MrXsquared 5 votes

QGIS Geopackage export of layer symbology

I want to save several layer as one geopackage. That works fine. My problem is, that the layers in the geopackage have a different symbology than they had before. I found a video where you could ...

qgis symbology geopackage  
asked by FreddySorbe 4 votes
answered by TeddyTedTed 7 votes

Create a PL/PSQL function that performs as fast as a normal query?

I'm trying to create a PL/psql function that cuts one user-defined geometry to a predefined border geometry. If the user-defined geometry does not intersect with the border geometry, it should return ...

postgis postgresql function optimization  
asked by Jonas Olsen 4 votes
answered by geozelot 7 votes

How to choose limited number of points to represent a point grid

I need to choose a few points to represent the grid below, e.g: 8 points in the grid below. This point need to be geographic distributed This points needs to be geographic distributed. Lets see a bad ...

python geoprocessing point-in-polygon spatial-cluster grid-cluster  
asked by Guilherme Lima 4 votes

Greatest hits from previous weeks:

Clipping raster with vector boundaries using QGIS?

I am using QGIS. I would like to clip a raster precipitation layer using an admin boundary layer that is vector data. However the geoprocessing tools seem to be usable only for vector data. How ...

qgis raster vector clip  
asked by Kirk 60 votes
answered by Pablo 37 votes

Difference between WGS84 and EPSG:4326?

What is the difference between WGS84 and EPSG 4326? It seems like for a given dataset it might be both WGS84 and EPSG:4326.

coordinate-system wgs84 epsg  
asked by Alex B 144 votes
answered by underdark 149 votes

Labels not appearing on any layer in ArcMap?

Not sure what the issue is, but I'm unable to get labels to display in ArcMap 10. The obvious things are accounted for (as far as I know). Labels are set in Properties, layers are checked to label in ...

arcgis-desktop arcgis-10.0 labeling  
asked by Jacques Tardie 15 votes
answered by Jacques Tardie 3 votes

Differences between DEM, DSM and DTM?

I am listing some of the acronyms used in our work and had to stop to think about whether to list these together or separately: DEM: Digital Elevation Model DSM: Digital Surface Model DTM: Digital ...

terminology dem  
asked by blah238 106 votes
answered by underdark 89 votes

Getting coordinates from click or drag event in Google Maps API?

I have made a Google Version 3 Geocoder , I want to be able to pick up the coordinates of the marker when it is dragged or clicked. Below is my code: <!DOCTYPE html> <html> <head> &...

google-maps-api html  
asked by Blake Loizides 12 votes
answered by EZMapdesign 9 votes

Importing DWG into QGIS project?

I have a lot of DWG files like basemap, and water and wastewater network. How do I import these files into my QGIS project?

qgis import dwg  
asked by BESCI 55 votes
answered by Nightwatch 41 votes

Adding Basemaps from Google or Bing in QGIS?

ArcGIS Desktop has the option of using basemaps from ArcGIS online. Does QGIS have any such options?

qgis google-maps basemap bing-maps  
asked by SNT 163 votes
answered by underdark 137 votes

Can you answer these questions?

Cloud-Optimized GeoTIFF overlay on Leaflet?

I want to load external Cloud-Optimized GeoTIFF files onto a Leaflet map as overlays, and manipulate the colors based on user input. I've found examples online that appear to to this exact thing, but ...

raster leaflet javascript geotiff-tiff web-mapping  
asked by DMack 1 vote

Plot a discrete raster over a hillshade using ggplot2

I'm having a hard time fixing a somwhat simple ggplot. I have a raster of a hillshade and I would like to overlay it with a classified prediction raster with the viridis color scheme. My code at the ...

raster r ggplot2 plotting  
asked by Lenn 1 vote

Download ALL data for an area from OpenStreetMap

I am trying to download ALL the OpenStreetMap data for a certain region. Meaning, I want the roads, the stores, the rivers, the parks, the traffic signals, the bus stops, ... everything. I'm ...

python openstreetmap json file-formats  
asked by Aaron Bramson 1 vote
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