Mapping

Geostatistics

Geostatistics 🌎

Lately I’ve been doing a lot of research and learning about geostatistics and using math to find clusters like Local Morans 1 and meaning out of data. It hasn’t yet resulted in a lot of data or useful maps yet but I’m sure it’s a useful skill to master with there being so much available using R, Geoda, GRASS and SAGA GIS.

If you are using a projected coordinate system, finding a location from a bearing and a distance is easy πŸ—Ί

If you are using a projected coordinate system, finding a location from a bearing and a distance is easy πŸ—Ί

newX = startX + distance * sin(bearing/180*pi)

newY = startY + distance * cos(bearing/180*pi)

Distance is in map units, so if you are working in UTM then that’s meters.

Bearing is in compass degrees, due north is 0, due east is 90, etc.

Mapping observation

I always think it’s a bit weird that longitude is the x axis, while latitude is the y axis, even though we always write latitude-longitude or y axis, x axis. Doesn’t x become before y?