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Unanswered Questions

24
votes
0answers
340 views

How to calculate distance to a feature with gdal_proximity?

I'm using gdal_proximity to find the distance to the nearest major river across the USA (lower 48 states). I've projected the NHD+ network flowlines to Conus Albers (epsg:5070), selected rivers with ...
14
votes
0answers
217 views

Setup QGIS with local plugin repository only

Is there a best practice how to setup QGIS without the official repository but only with a local repository? The idea behind this is to setup a stable environment where local GIS-admins check plugins ...
13
votes
0answers
458 views

Configure which bands to display from a 4-band ArcGIS image service?

The USDA (via the National Map) provides 4-band NAIP ArcGIS "ImageServer" (services) for most states in the US. I am able to successfully connect to the WMS service in QGIS as described here, which ...
11
votes
0answers
290 views

Why are geolocation on twitter “rounded”?

I'm plotting some geolocations (lon, lat) of tweets collected using the stream API with a 7mi. radius. The picture below shows two maps of the same data, but using different alpha/transparency for ...
11
votes
0answers
232 views

SNAP vs. GDAL vs. Orfeo - image rescale, histogram cut

I work with a Sentinel-2 .jp2 image (red band, 10950 x 10950 pixels). My aim is to reach the same result what SNAP does with a Python script. See the SNAP method and parameters: So this is my ...
11
votes
0answers
458 views

How to control the arrow length of vector field markers in the layer list legend?

In QGIS 2.14.5 LTR (and recently in QGIS 3.0) I've set up a beautiful map design with a graduated renderer and vector field markers for each value range (arrow length is directly proportional to ...
10
votes
0answers
631 views

Leaflet v1 plugin: layer control for ungrouped, grouped, and nested-grouped layers

I need a Leaflet plugin which extends L.Control.Layers. I have the following requirements: works with Leaflet 1.x handles ungrouped layers alongside grouped ones handles nested layer groups does not ...
10
votes
0answers
343 views

rMaps choropleth with custom json

With R I want to make an animated choropleth map with the rMaps package and a custom map. I tried to follow the example of Diego Valle described here and to use the custom map info for Datamaps. ...
9
votes
0answers
189 views

Determining flow path length in QGIS?

I need help with qgis flow path length. I try to run the program and when I run the program I get a raster with 0 values, as input I'm using filled raster, I don't now if I'm doing something wrong or ...
9
votes
0answers
337 views

How to connect Qgis with pycharm in Ubuntu OS

I have just started using pycharm with qgis but could not connect both of them. Pycharm always stays in a state of "waiting for connection". Most the tutorials available points to the windows but I am ...
9
votes
0answers
926 views

Plotting bar charts on maps in R?

I'm using plotrix in R to plot a state level map of the US. It has an excellent function floating.pie to put pie charts on each state. I'm wondering if there are similar functions within the plotrix ...
9
votes
0answers
1k views

Save and load user profiles in QGIS

Is there a way use a configuration file, maybe .ini to load in the relevant settings for QGIS when it is setup, maybe to share with various people? Plugins installed and plugin repositories filled in ...
8
votes
0answers
155 views

QGIS 3.0 point cluster renderer, is it possible to control rendering order (z-order)?

I've been having a play with the new point cluster renderer in QGIS 3.0.2 and it's great - a lot easier (and faster) than having to do the clustering yourself. To show what I mean, here's an example ...
8
votes
0answers
191 views

Cannot Open VRT of Sentinel2 image created by AutoCreateWarpedVRT

I am trying to create a warped VirtualRaster of a Sentinel2 image. Here the Python code I tried: from osgeo import gdal, osr srs = osr.SpatialReference() srs.SetFromUserInput('EPSG:32632') gdal....
8
votes
1answer
418 views

Generate static heat maps server side?

I've been searching for a way to generate server side static maps using Python (or any other languages, doesn't matter). I can create the maps I want with QGIS (and they look really great) but I don'...

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