I'm building a geospatial app, what data APIs should I look at?

Here are the main geospatial data API categories worth evaluating for a geospatial app, plus a few strong providers in each.

1) Basemaps and map tiles

For the map itself.

• Mapbox — high-quality vector tiles, styles, satellite, geocoding, routing, isochrones.
• Google Maps Platform — excellent POI/search, roads, directions, places.
• HERE — strong enterprise mapping, routing, traffic, logistics.
• Esri ArcGIS — great for GIS-heavy workflows, enterprise and spatial analysis.
• OpenStreetMap-based providers — cheaper/open options, often with more flexibility.

2) Geocoding and reverse geocoding

Convert addresses ↔ coordinates.

• Google Geocoding API
• Mapbox Geocoding API
• HERE Geocoding & Search
• Smarty — strong address validation/parsing in the US.
• OpenCage — aggregates multiple sources, simple global geocoding.

3) Places / POI / search

Useful for “find nearby,” business listings, category search.

• Google Places API
• Foursquare Places API
• HERE Places
• Mapbox Search / Search Box
• Yelp Fusion API — good for reviews and business discovery in supported regions.

4) Routing, directions, and navigation

For turn-by-turn, ETA, delivery, fleet, mobility.

• Google Directions API
• Mapbox Directions API
• HERE Routing API
• TomTom Routing API
• OpenRouteService — good open-source-friendly option.

5) Traffic and travel time

If your app depends on live conditions.

• Google Traffic
• HERE Traffic
• TomTom Traffic
• INRIX — strong for enterprise and mobility analytics.

6) Isoline / isochrone / service areas

“How far can I get in 15 minutes?”

• Mapbox Isochrone API
• OpenRouteService Isochrones
• HERE Isoline
• Google has related functionality via routing/Distance Matrix

7) Elevation and terrain

Useful for hiking, outdoor, planning, drone, watershed, viewshed.

• Google Elevation API
• Mapbox Terrain / terrain-rgb
• OpenTopoData
• USGS / SRTM-based datasets for more direct data access

8) Search, autocomplete, and address validation

For better UX in forms and location entry.

• Google Places Autocomplete
• Mapbox Search Box / autocomplete
• HERE Autocomplete
• Smarty for validation and standardization

9) Weather, environmental, and hazard data

If your app cares about conditions.

• OpenWeather
• Tomorrow.io
• Meteomatics
• NOAA APIs for US weather/environmental data
• USGS for hazards, water, and earth science data
• Air quality: IQAir, BreezoMeter, OpenAQ

10) Demographics and business intelligence

For location intelligence, site selection, market analysis.

• Census APIs — US demographics
• ArcGIS Living Atlas
• Esri demographic data
• SafeGraph (availability/terms vary)
• Data Axle / similar POI and business datasets

11) Satellite, imagery, and remote sensing

For land use, agriculture, change detection, monitoring.

• Planet
• Maxar
• Sentinel Hub
• Google Earth Engine — analysis platform more than a simple API, but very powerful
• USGS EarthExplorer / Landsat / Sentinel datasets

12) Open data and global datasets

Good if you want lower cost or custom pipelines.

• OpenStreetMap
• Natural Earth
• GeoNames
• Overpass API for querying OSM features
• US Census / TIGER/Line
• OpenAddresses
• GHSL / WorldPop / World Bank depending on use case

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How to choose

A simple way to narrow it down:

• Consumer map app: Mapbox or Google, plus Places and Directions
• Logistics/fleet: HERE or TomTom, plus traffic and routing
• GIS/enterprise: Esri + your own data sources
• Budget/open stack: OpenStreetMap + OpenRouteService + OpenCage + OpenWeather
• Location intelligence: Foursquare/Google/Esri + census/demographics

Key evaluation criteria

When comparing APIs, check:

• Coverage: countries, rural areas, indoor/POI depth
• Accuracy: geocoding precision, routing quality, ETA reliability
• Latency: response time and batch support
• Pricing: per-request, session-based, data transfer, overages
• Licensing: storage, caching, display restrictions
• Rate limits: especially for autocomplete and geocoding
• SDKs: web, iOS, Android, backend
• Data freshness: traffic, POI updates, map edits
• Compliance: privacy, GDPR/CCPA, usage terms

Practical starter stacks

• Fast MVP: Mapbox + OpenCage + OpenRouteService
• Best UX: Google Maps Platform end-to-end
• Enterprise logistics: HERE + traffic + fleet APIs
• Open and flexible: OSM + Nominatim/Photon + OSRM + Overpass

If you tell me what kind of geospatial app you’re building — for example delivery, real estate, outdoor recreation, transit, asset tracking, or analytics — I can suggest a tighter stack and specific APIs to start with.