GIS Data Cleaning

The full path, in order

33 guides: the concepts underneath the work, then each task, then the errors that task produces. Work down, or jump to the step you need.

1. 2 What Makes a Geometry Valid? The OGC Rules Explained valid geometry rules gis 🧭 Concept
2. 3 Spatial Data Quality: The Six Dimensions That Matter spatial data quality dimensions 🧭 Concept
3. 4 WKT, WKB and GeoJSON: How Geometry Is Actually Stored wkt wkb geojson difference 🧭 Concept
4. 5 Topology in GIS Explained: Slivers, Gaps and Shared Boundaries gis topology explained 🧭 Concept
5. 6 Coordinate Precision and Floating Point in GIS Explained coordinate precision gis floating point 🧭 Concept
6. 7 How to Find and Remove Duplicate Geometries in GeoPandas remove duplicate geometries geopandas ⚙️ How-To
7. 8 How to Standardise and Repair CRS Across a Folder of Files in Python standardise crs across files python ⚙️ How-To
8. 9 How to Clean and Normalise Attribute Columns in a GeoDataFrame clean attribute columns geodataframe ⚙️ How-To
9. 10 How to Handle Missing and Null Values in Spatial Datasets in Python handle missing values spatial data python ⚙️ How-To
10. 11 How to Snap and Align Geometries to Fix Slivers and Gaps in Python snap geometries fix slivers python ⚙️ How-To
11. 12 How to Validate a GeoDataFrame Against a Schema Before Analysis validate geodataframe schema python ⚙️ How-To
12. 13 How to Clean Messy CSV Coordinates into a Reliable GeoDataFrame clean csv coordinates ⚙️ How-To
13. 14 How to Build a Repeatable Data-Cleaning Report in GeoPandas data cleaning report geopandas ⚙️ How-To
14. 15 How to Remove Null and Empty Geometries in GeoPandas remove null geometries geopandas ⚙️ How-To
15. 16 How to Split Multipart Geometries into Single Parts in GeoPandas explode multipart geometries geopandas ⚙️ How-To
16. 17 How to Fuzzy-Match Place Names When Joining Spatial Data in Python fuzzy match place names python ⚙️ How-To
17. 18 How to Find and Remove Spatial Outliers in a Point Dataset remove spatial outliers python ⚙️ How-To
18. 19 How to Clean and Standardise Date Columns in Spatial Data clean date columns spatial data python ⚙️ How-To
19. 20 How to Reduce GIS File Size in Python Without Wrecking the Data reduce gis file size python ⚙️ How-To
20. 21 How to Fix Invalid Geometries in Python (GeoPandas) invalid geometries geopandas 🔧 Fix
21. 22 How to Fix CRS Mismatch in GeoPandas crs mismatch geopandas 🔧 Fix
22. 23 Cannot Transform Naive Geometries to CRS: How to Fix It in GeoPandas cannot transform naive geometries 🔧 Fix
23. 24 Why Are My Shapefile Column Names Truncated? How to Fix It shapefile column names truncated 🔧 Fix
24. 25 GeoPandas "No Geometry Column" Error: How to Fix It geopandas no geometry column 🔧 Fix
25. 26 Shapely TopologyException: Found Non-Noded Intersection (How to Fix) shapely topologyexception 🔧 Fix
26. 27 GeoPandas "Columns Overlap but No Suffix Specified" Error: How to Fix It columns overlap but no suffix specified 🔧 Fix
27. 28 GeoPandas Spatial Join Returns Duplicate Rows: How to Fix It geopandas spatial join duplicates 🔧 Fix
28. 29 buffer(0) Does Not Fix My Invalid Geometry: What to Do Instead buffer 0 not fixing geometry 🔧 Fix
29. 30 Garbled Attribute Text and UnicodeDecodeError from a Shapefile: How to Fix Encoding shapefile encoding error python 🔧 Fix
30. 31 GeoPandas to_file() Fails on a Column Type: How to Fix It geopandas to_file field type error 🔧 Fix
31. 32 Mixed Geometry Types Error When Saving a GeoDataFrame: How to Fix It mixed geometry types geopandas 🔧 Fix
32. 33 My Points Plot in the Ocean: Fixing Swapped Latitude and Longitude points plotting in the ocean geopandas 🔧 Fix