Geospatial-Data-Validation-Tool

Overview

The Geospatial Data Validation Tool is designed to facilitate the validation and verification of geospatial datasets. This tool helps ensure the quality and consistency of geospatial data through various checks and validations. It supports common geospatial formats such as Shapefiles and GeoJSON.

Features

1. Topology Checks

   • Detect overlapping polygons, gaps, or slivers.
   • Check for self-intersecting geometries.

2. Coordinate System Validation

   • Verify that datasets use consistent coordinate reference systems (CRS).
   • Offer automatic re-projection options.

3. Data Completeness

   • Identify missing attributes or incomplete records.
   • Validate attribute data types and value ranges.

4. Error Reporting

   • Generate detailed reports with visualizations of detected issues.
   • Provide recommendations for fixing errors.

5. Input/Output Formats

   • Support for common geospatial formats including Shapefiles, GeoJSON, and others.

Installation

There are a few different options, choose the one that is best for you.

Install from conda:

conda install billyz313::poly-validator

Install from pip

pip install poly-validator

Install from repo

• Using conda:

  git clone https://github.com/billyz313/Geospatial-Data-Validation-Tool.git
  cd Geospatial-Data-Validation-Tool
  
  conda env create -f environment.yml
  conda activate geovalidator
  

OR

• Using venv:

  bash
  git clone https://github.com/billyz313/Geospatial-Data-Validation-Tool.git
  cd Geospatial-Data-Validation-Tool
  
  python3 -m venv geovalidator
  source geovalidator/bin/activate  # On Windows, use `geovalidator\Scripts\activate`
  pip install -r requirements.txt
  

Usage

Load and Validate Geospatial Data

To load a GeoJSON file and perform validations, use the following script:

import geopandas as gpd
from polyvalidator.validators.topology import detect_overlaps, detect_gaps, detect_slivers, check_self_intersection

# Load the GeoJSON file
file_path = 'path/to/your/file.geojson'
gdf = gpd.read_file(file_path)

# Apply validation functions
overlapping_polygons = detect_overlaps(gdf)
gaps = detect_gaps(gdf)
slivers = detect_slivers(gdf, area_threshold=0.01)  # Adjust area_threshold as needed
self_intersections = check_self_intersection(gdf)

# Print results
print("Overlapping Polygons:")
print(overlapping_polygons)

print("\nGaps:")
print(gaps)

print("\nSlivers:")
print(slivers)

print("\nSelf-Intersecting Geometries:")
print(self_intersections)

Contact

Software Developer

• Billy Ashmall

License and Distribution

Geospatial-Data-Validation-Tool is distributed by BillyZ under the terms of the {type of license you choose} License. See LICENSE in this directory for more information.

Privacy & Terms of Use

Geospatial-Data-Validation-Tool abides to all of BillyZ's privacy and terms of use as described at https://ashmall.com/Privacy-Terms-of-Use.html.