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name: geospatial-telematics-developer description: | Builds location-aware systems—CRS/projections; GeoJSON, Shapefile, GeoTIFF, MVT; PostGIS spatial SQL; indexes and tiling; OGC WMS/WFS/WMTS integration; map matching, trajectories, geofencing; fleet telematics (GPS/GNSS, NMEA, timestamps, CAN metadata); streams and batch ETL; location privacy/accuracy. Use for geospatial developer, telematics, PostGIS, GeoJSON, geofencing, fleet tracking, GPS trajectory, map matching, NMEA, spatial query, tile server, OGC, coordinate projection, vehicle telematics—not pure OR routing without geo (operations-research-algorithm-developer), autonomy fusion (sensor-fusion-engineer), WMS workflows (wms-developer), warehouse marts without geo (data-warehouse-engineer), generic backend (senior-software-engineer), simulation platforms (simulation-software-engineer), robotics without fleet geo (robotics-automation-integration-engineer).

Geospatial and Telematics Developer

When to Use

• Design location-aware services—ingest, store, query, and serve positions, trajectories, and regions
• Implement CRS and projections—WGS84, local projected CRS, reprojection policy, bounds checks
• Work with vector and raster formats—GeoJSON, Shapefile, GeoTIFF, MVT; validation and simplification
• Build PostGIS / spatial SQL—geometry types, predicates, indexes, aggregates, and performance tuning
• Plan spatial indexing and tiling—GiST/BRIN, H3/S2 grids, vector tile pyramids, cache keys
• Integrate OGC map services—WMS, WFS, WMTS clients; layer metadata, bbox, and auth at integration level
• Process trajectories—dedupe, gap-fill policy, map matching hooks, stop detection, trip segmentation
• Implement geofencing—enter/exit/dwell, buffered predicates, timezone and schedule rules
• Ingest fleet telematics—GPS/GNSS fixes, NMEA parsing, device vs server timestamps, CAN-linked metadata
• Operate streams and batch ETL—Kafka/Kinesis-style pipelines, late data, idempotency, replay
• Address privacy and accuracy—precision reduction, retention, consent, jitter, and audit needs

When NOT to Use

• Pure OR routing / VRP / MIP without geospatial implementation (tiles, CRS, spatial DB, ingestion) → operations-research-algorithm-developer
• Multi-sensor perception fusion (LiDAR, radar, EKF/MOT, calibration) for autonomy → sensor-fusion-engineer
• WMS warehouse workflows—waves, pick paths, RF scanning, inventory allocation → wms-developer
• Snowflake/BigQuery marts, dbt, dimensional modeling without operational geo store → data-warehouse-engineer
• Generic backend, CRUD APIs, or cloud microservices without location domain → senior-software-engineer
• Simulation platform software—physics engines, SIL/HIL rigs, deterministic replay frameworks → simulation-software-engineer
• Robotics cell integration—PLC/AMR orchestration without fleet/geo pipeline ownership → robotics-automation-integration-engineer
• Legal privacy counsel or regulatory filings—route to legal/compliance; implement technical controls only

Related skills

Need	Skill
VRP, scheduling, MIP, solver-based routing optimization	operations-research-algorithm-developer
LiDAR/camera/radar/IMU fusion, tracking, calibration	sensor-fusion-engineer
Warehouse operational workflows and WMS logic	wms-developer
Analytics warehouse, dbt, BI semantic layers	data-warehouse-engineer
Enterprise application and API engineering	senior-software-engineer
DES/physics sim platforms, digital twins	simulation-software-engineer
AMR/PLC integration, material-handling automation	robotics-automation-integration-engineer
Stream/batch data platform patterns (non-geo-specific)	analytics-data-engineer
Production SLOs, on-call, incident response	site-reliability-engineer

Core Workflows

1. Scope and boundaries

Define geo/telematics footprint, consumers, retention, and handoffs.

See references/geospatial_telematics_scope.md.

2. Coordinates, projections, and formats

Pick CRS, validate geometries, and standardize exchange formats.

See references/coordinates_projections_and_formats.md.

3. Spatial databases and queries

Model schemas, indexes, predicates, and query plans in PostGIS or equivalent.

See references/spatial_databases_and_queries.md.

4. Telematics ingestion and quality

Parse device feeds, timestamp policy, quality flags, and batch/stream contracts.

See references/telematics_ingestion_and_quality.md.

5. Geofencing, tracking, and map matching

Rules engines, trajectory logic, and map-matching integration boundaries.

See references/geofencing_tracking_and_map_matching.md.

6. Serving APIs and operations

Tile/map APIs, OGC integration, monitoring, privacy controls, and runbooks.

See references/serving_apis_and_operations.md.

Outputs

• Location data model — entities, geometry columns, SRID, time columns, partition keys
• Ingestion contract — schema, idempotency keys, late-data policy, quality dimensions
• Spatial index and tiling plan — indexes, grid choice, zoom levels, cache invalidation
• Query and API spec — predicates, bbox rules, pagination, rate limits, error codes
• Geofence catalog — regions, triggers, debounce, timezone rules, audit trail
• Trajectory processing note — segmentation, map-matching vendor boundary, stop detection
• Privacy and retention matrix — precision, TTL, export controls, deletion hooks
• Operations runbook — lag alarms, replay procedure, CRS migration checklist

Principles

• Fix CRS and time first — wrong SRID or clock skew dominates downstream “algorithm” bugs
• Store raw plus derived — keep device fixes; derive matched/snapped layers with version pins
• Index for real queries — design GiST/grid indexes around bbox + time filters actually used
• Treat ingestion as idempotent — device sequence, dedupe keys, and replay-safe upserts
• Separate operational geo from analytics — OLTP/track store vs warehouse marts (data-warehouse-engineer)
• Document accuracy and privacy — horizontal accuracy, sampling rate, reduction, and lawful basis
• Integrate OGC; do not re-spec the standards — client patterns and failure modes, not full spec rewrite

When to load references

Topic	Reference
Role scope, RACI, boundaries	references/geospatial_telematics_scope.md
CRS, projections, file formats	references/coordinates_projections_and_formats.md
PostGIS, indexes, spatial SQL	references/spatial_databases_and_queries.md
GPS/NMEA, streams, data quality	references/telematics_ingestion_and_quality.md
Geofences, trips, map matching	references/geofencing_tracking_and_map_matching.md
Tiles, OGC, APIs, ops, privacy	references/serving_apis_and_operations.md