1

As from here, I'm using the OpenTopography API to download a geoTiff heightmap, and it uses 4 WGS84 Coordinates, but the map I've supplied to the user gives back longitude/latitude coordinates. I'm very new to GIS, so I was wondering if there was some kind of equation for converting them.

2
  • Commonly, a bounding box is specified as the SW corner and the NE corner- that is, 2 coordinates. However, as @Spacedman explains, this site uses the 4 "lines" that define the box- the southern and northern extents (latitude) and the western and eastern extents (Longitude). You can extract 4 unique coordinates where these intersect, but you only need 2 to define the box- S and W, and N and E. They are all latitude-longitude and require no equation to convert. – Leigh Bettenay Mar 14 at 10:27
  • @LeighBettenay Thanks! I've recently just figured this out, and I'm sure it would be a massive help to anyone else. – MilkyDeveloper Mar 14 at 17:05
1

"WGS84" coordinates are (usually) latitude and longitude.

There are lots of different definitions of latitude and longitude, based on different earth shapes or different reference points for 0 longitude. What's called "WGS84" is usually a specific standard for lat-long, more formally called "EPSG Coordinate Reference System Code 4326".

These are the coordinates used by GPS location systems, and should be the default lat-long system for any new data. Sometimes you find older data based on a different earth-shape model or a non-standard 0 longitude meridian. But what I see on that web page API is (99.999%) probably all "WGS 84 lat-long".

enter image description here

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.