What I do
- Query spatial data efficiently
- Implement location-based queries and services
- Design spatial indexes
- Work with geographic coordinate systems
- Process geospatial data
When to use me
When building location-based services, GIS applications, or any system requiring spatial queries.
Key Concepts
Spatial Data Types
- Points, Lines, Polygons
- MultiPoint, MultiLine, MultiPolygon
- Geometry vs Geography
- Z coordinates (3D)
- M coordinates (measures)
Coordinate Systems
- WGS84 (EPSG:4326)
- Web Mercator (EPSG:3857)
- UTM zones
- Coordinate transformations
- Projected vs geographic CRS
Spatial Indexing