GIS

Create fishnet grid using Python, GeoPandas and Shapely

There are many use cases in GIS where we need to compute parameters or aggregate information based on fishnet. One of the use case is to aggregate information for million of points on fishnet. Then use this aggregated fishnet layer to render on map. This aggregated fishnet layer will be more intuitive in nature than …

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Polygonize Raster using Rioxarray and GeoPandas

Rioxarray is python library which combines xarray and rasterio library for raster analysis. Xarray is open source and python packages that makes working with labelled multi dimensional array very efficient. RasterIO is open source and python package based on gdal to read/write and analyze raster data. Rioxarray extends xarray with rasterio accessor. One of the …

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Import shapefiles using GeoPandas and PsycoPG2.

GeoPandas is great python library to process your vector data. It has direct support for postgis database where you can directly read/write from/to postgis database. GeoPandas internally uses SqlAlchemy API to manage database specific operations like reading from PostGIS, writing to PostGIS etc. SqlAlchemy can be used for almost all the databases out there like …

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Integrating OpenLayers Map with VueJS: Create Map – Part 1

In this tutorial, we will learn how to integrate OpenLayers map with VueJS . VueJS is a progressive framework that covers most of common features needed for the front end development. Using any framework be it ReactJS or VueJS makes sense because if your application is becoming more and more complex, using any modern framework …

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Implement Undo Redo operation for zooming to Previous/Next extent and zoom in OpenLayers.

To get full source code for this tutorial, click here. To check the live demo for this tutorial, click here. In this post, we will implement a Undo/Redo operation for zooming to Previous/Next extent and zoom in OpenLayers. Using this functionality, we will able to navigate to previous or next extent. This operation is similar …

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Import rasters file to PostGIS database using raster2pgsql

raster2pgsql is GIS command line utility which is installed as a part of PostGIS. To install raster2pgsql, you have to install PostGIS and raster2pgsql will be installed with it. To import raster to postgis, type following command in terminal and replace file name and database details with yours. It will successfully import your raster to …

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