viktor-platform/gis-analysis

This sample app demonstrates how to do GIS-analysis in Viktor.

GIS analysis

This sample app demonstrates how to do a GIS-analysis.

The goal of this app is to demonstrate some common GIS analyses using Viktor. This app was developed using an open-source library (geopandas), which provides a powerful toolkit for GIS-analysis. Using Viktor, complex analysis becomes easy to perform, accessible through the browser.

In this application the following functionalities are demonstrated:

• Uploading and visualizing custom GIS-data (shapefile, geopackage, geojson)
• Apply filters
• Interact with data on the map
• Download data as any GIS-datatype (shapefile, geopackage, geojson, autocad)

A published version of this app is available on demo.viktor.ai.

Step 1: Upload GIS-data

Easily upload your own GIS-data. All major data-types are supported, such as shapefile, geopackage and geojson. When uploading a shapefile, make sure it is zipped into a single file.

Some sample data it pre-loaded to play around with by default, so it is possible to skip this step.

Step 2: Set filter

Activate the filter and only visualize the shapes on the map, for which its values are within the filter.

First choose a field name. The field names are automatically imported from the attribute table. Then, choose a filter type. Two options are available, unique and range.

• Unique values: all unique values from the selected field name are imported
• Range: Set a minimum and maximum value to filter numerical values

Step 3: Compare by ranking

Within VIKTOR it is also possible to interact with the map, which is demonstrated here.

Click on "Select features to compare". The user is asked to select features on the map to compare. Then, select a field name and a value to compare with.

When the selection is finished, the results are shown in the data tab on the right-hand side and are ranked from high to low.

Step 4: Download file

Finally it is possible to export the features to different types of GIS-datatypes:

• Shapefile
• Geopackage
• AutoCAD
• GeoJSON

Additionally, it is possible to project the features to any coordinate system (ESPG).