Month: September 2022

Merge rasters in Python using Rioxarray

Rasters merging/mosaic is one of the common task in raster processing. In this tutorial, we will merge multiple rasters into one in python using Rioxarray. Merging/mosaic multiple rasters into one is also known as union of rasters. Rioxarray is open source gis package that extends the functionality of xarray by rasterio. Before merging multiple rasters …

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Creating GeoDataFrame from DataFrame with coordinates or wkt

The usage of Python in GeoSpatial field has exponentially grown. Almost every GIS desktop software provide python integration. QGIS, famous open source GIS software, has python interface. Python has many open source GIS libraries for example GDAL, Fiona, GeoPandas, RasterIO, Shapely, Xarray Spatial etc. These libraries can process both raster as well as vector data. …

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Upsample and Downsample raster in python using rioxarray

Raster resampling refers to altering the raster resolution by changing raster grid. Upsampling refers to reducing pixel size and increasing resolution. And downsampling refers to increasing pixel size and reducing resolution. The raster resampling or upscaling/downscaling is done when you want to convert 10 meter cell to 50 meter cell or vice versa. Even when …

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Clip raster by polygon geometry in Python using Rioxarray

Clip/crop raster by polygon geometry in Python using Rioxarray Raster clipping is one of the common task in raster processing. In this tutorial, we will clip a raster by polygon geometry in python using Rioxarray. Rioxarray is open source gis package that extends the functionality of xarray by rasterio. Before cropping/clipping the raster data, we …

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Generate Heatmap using Datashader in Python and serve the heatmap tiles in OpenLayers map

Datashader is a python library for fast rasterization and visualization of larger datasets preserving the data’s distribution. Datashader is built using Numba which a open source JIT compiler that translates subsets of python and numpy into faster machine code. Before generating the heatmap, we will set up conda environment and install required python GIS packages …

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Rasterize vector data using GeoPandas and GeoCube

In this tutorial, we are gonna convert a Polygon and Points vector data into raster format by using GeoPandas and GeoCube in python. To get full source code for this tutorial, click here. All the related Polygon and Point data used in this tutorial are in repository. Before rasterizing the vector, we will set up …

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