gis:project-lat-lon

gis:project-lat-lon latitude longitude

Report the position, in NetLogo space, of the given latitude and longitude pair according to the current map projection and transformation.

Like the location-of primitive, the reported xcor and ycor values are reported in a two-item list of [xcor ycor] and an empty list if the specified point is outside of the bounds of the netlogo world. For instance:

let location-of-abbey-road-studios gis:project-lat-lon 51.5320787 -0.1802646
let abbey-road-xcor item 0 location-of-abbey-road-studios
let abbey-road-ycor item 1 location-of-abbey-road-studios

Note that this primitive assumes that the given lat/lon pair are relative to the WGS84 datum/ellipsoid. If your data is based on GPS observations or GeoJson files, then your data is already relative to WGS84. If you are unsure about what datum your data is, then you should probably just assume it is WGS84 and use this primitive. However, if you do know that your data is relative to a different datum and that extra degree of precision is important to you (if you are, say, comparing values from location-of and project-lat-lon) then you should use project-lat-lon-from-ellipsoid and specify the desired datum’s ellipsoid.