AskGeo API: Interactive map, web API and Java library for finding out the time zone information for a given location (latitude and longitude). Submit latitude and longitude, and the API returns the unix (Olson) time zone ID, the Windows Standard Name for the time zone, and the current offset from UTC.
data.gov.sg API: The Government of Singapore offers an online data catalogue at data.gov.sg for data from dozens of government agencies. A number of APIs are available including APIs for maps (wireless hotspots, family services, performing arts centers, monuments, waste disposal sites, parks, hotels, tourist attractions, etc.); traffic (incidents, images, road conditions, parking availability, etc.); tourism (events, places, hotels, etc.); environment (weather conditions, vehicle and appliance pollution datasets, etc.); and library data feeds (eBook catalogues, library programs and locations, new item search, catalogue search, etc.). APIs are RESTful, JavaScript, and ESRI.
Micello API: Micello is an indoor mapping service. Micello offers indoor maps of venues, such as shopping malls, airports, hospitals, and museums. Micello indoor maps can be used for integration with outdoor maps, as well as navigation and wayfinding.
Micello offers two APIs: a JavaScript API that allows developers to embed indoor maps into applications and a Map Web Services API that allows for retrieval and display of indoor maps by location, proximity, and retrieving map information. Public documentation is available, but limited. Interested developers should register for an API Key for full API access.
Moonshadow Mobile API: Moonshadow Mobile works with large databases to visualize “big data” over maps. The Moonshadow Mobile API provides acces to over one billion records related to the US population. Data available includes census data from 2000 and 2010, the adult population database and registered voters database. The API uses JavaScript protocol and responses are formatted in JSON.
OpenRouteService API: The API implements a route-finding service for cars, pedestrians, and bicycles based on Open Standards and Open Geodata. Coverage varies depending on data contributed. It also adds several location-aware services created from OpenStreetMap data: Geocoder/Reverse Geocoder, Directory Service, Accessibility Analysis Service, and Emergency Route Service. Please contact the providers prior to using the API. They are interested in spreading the usage of OpenRouteService in academic and non-profit projects.
SpatialStream API: The API provides a series of programming interfaces to simplify the integration of advanced spatial intelligence into existing applications. It creates a SaaS geospatial platform for developing location-aware information applications on top of common mapping platforms. The service was designed to facilitate the rapid development of embedded GIS and consumer mapping applications without needing to be a GIS expert. In addition to REST services, specialized client APIs are available to work with Google and Bing map controls.