Data Clock in QGIS and Plotly
Visualization of seasonal or cyclic time series data as a circular, polar heatmap
Tag: Python
Changing fonts in a QGIS map within seconds
With the QGIS plugin Adjust Style it is easy to replace a font family anywhere in a map
Plotly Sunburst: Set the color of the central category
A simple hack to change the color in the center of a sunburst chart
QGIS raster layer to NumPy array and back
RasterWizard: get the data of a QGIS raster layer as a NumPy array, and the processing result back into QGIS as a new raster layer
Waffle Chart with Plotly
Creating the squared alternative to pie charts with Plotly in Python
QGIS: No Data in raster layers
In QGIS, filters normally ignore No Data cells automatically. However, this is not always easy, especially if a filter examines neighboring cells and these contain No Data. What happens depends on the implementation, but is problematic in both cases. In raster layers, “No Data” is coded with a specific number, e.g. -9999. If, for example, … Continue reading “QGIS: No Data in raster layers”
QGIS plugin Scipy Filters
New QGIS plugin for raster layers with convolution, morphological filters, principal component analysis, statistics, etc.
How to check if a map feature is within a polygon (e.g. within a country) using Python
Add the region, country etc. to your map features using Geopandas.
Union of shapefiles without duplicates using python
How to combine a bunch of shapefiles (or QGIS vector layers) into a single one without dublicates using python with geopandas
Assign the correct UTM zone to a project in QGIS with one click
Anyone who regularly opens a GPS track in QGIS or works on a local map often wants to have the map displayed in the UTM system. To do this, you first had to find out the correct UTM zone and search for it in the corresponding dialogue box. The first plugin I wrote for QGIS … Continue reading “Assign the correct UTM zone to a project in QGIS with one click”
Explore runkeeper GPS tracks with python (part 2)
How to import all runkeeper GPS tracks (GPX files) into a single GeoDataFrame, and analyse and map them using python
Explore runkeeper GPS tracks with python (part 1)
How to explore a single GPS track (GPX file) with python
Assign elevation to GPS track with python
How to assign elevation to a GPX file? With Python this is easy thanks to elevation, geopandas, rasterio and SRTM data.
Folium and Geopandas: FeatureGroup for categorial data
How to assign categorical data to individual layers (FeatureGroup) on a map created with Folium.
PyGMT: Different colormaps for land and water
A correct coastline in the map thanks to grdlandmask so that Holland is not under water.
Trekking map with PyGMT and Python
How to plot a simple map with a GPS track in Python and PyGMT using the Tour du Mont Blanc as an example.
Import GoogleEarth placemarks KML into Geopandas
Get the placemarks of all folders of a KML file into a GeoDataFrame using minidom (Python)
Open GPS tracks (GPX files) with Geopandas
It is easy to open a complete folder of GPS Tracks (GPX files) in Geopandas, e.g. for plotting maps or to export them as shapefile.