Abdul Rahman

Geometry Quality Checker

Check, review and improve the quality of your spatial data.

I built Geometry Quality Checker because polygon datasets rarely arrive clean, and checking them by hand is slow and inconsistent. This GIS tool finds the common geometry errors, lets you review each one on the map, applies corrections safely, and produces reports you can hand to someone else with confidence.

What it checks

• Overlaps — polygons that intersect each other.
• Gaps — unwanted spaces between neighbouring polygons.
• Slivers — very small, unwanted polygon shapes.
• Self-intersections — invalid shapes whose boundaries cross themselves.
• Zero size — polygons with zero or invalid area.
• Empty geometry — features with no geometry at all.
• Schema and attributes — missing required fields and incorrect values.

Review and correction

Every issue can be reviewed individually, with the affected features highlighted on the map, and fixed either manually or automatically. I am particularly proud of the automatic correction: it shows a preview first, and a fix is accepted only when it meets the configured tolerance and passes verification. Undo and redo are there where supported, so nothing is ever a one-way door.

Reports and export

The tool keeps an activity log of every operation and generates structured PDF and Excel reports. Corrected data exports to GeoPackage or Shapefile.

Data protection: the original source data is never modified directly. All processing runs on a working copy, and every change is recorded for review.

Mawqi – Subdivision Finder

Find subdivision coordinates quickly and navigate to their locations.

Mawqi is the mobile app I wish had existed years ago. Type a subdivision number, pick the sector, and it shows the coordinates and opens the route in Google Maps. What used to take several messages and a lot of manual typing now takes a few taps, and it works in the field without a connection.

Key features

• Data import — supports DXF, Shapefile and compressed Shapefile files.
• Subdivision search — enter a subdivision number and select the relevant sector.
• Coordinate display — see the location in UTM coordinates and latitude/longitude.
• Navigation — open the selected location directly in Google Maps.
• Fast search — stored subdivision information comes back instantly.
• Phone and tablet support — layouts designed for different screen sizes.

How it works

1. Import the required data into the application.
2. Select a sector from the available list.
3. Enter the subdivision number.
4. View the matching result and its coordinates.
5. Tap Navigate Me to open the destination in Google Maps, with the route and travel time ready to go.

Offline access and privacy

After the initial import, searches run entirely offline. Imported data is stored on the device and the app never uploads it to an external server. Internet access is needed only when Google Maps opens for navigation.

Important: the displayed coordinate is the stored label position from the source data. It should not automatically be treated as a surveyed centre point.