topic Re: ArcPy get MeanCellSize in Meters in Python Questions

ArcPy get MeanCellSize in Meters

MikeWunderlich2 — Tue, 22 Nov 2016 20:11:36 GMT

Hi,

I am trying to create an Index of all GEO-Data on my PC.

But with the MeanCellSize I have a problem, If the Raster data is a geographic the MeanCellSize is in Degree.

Of course, I can project every Raster as an "im_memory" variable but, there must be an easier way?

Raster—ArcPy Classes | ArcGIS for Desktop

Thanks Mike

Re: ArcPy get MeanCellSize in Meters

JoshuaBixby — Tue, 22 Nov 2016 20:21:17 GMT

The response I would give is embedded in a response to a similar question on StackExchange: What are the units of the calculated area from a raster in decimal degree

Re: ArcPy get MeanCellSize in Meters

DanPatterson_Retired — Tue, 22 Nov 2016 22:17:55 GMT

My guess would be that those numbers will translate to round metric numbers using the approximations specified by W Huber in the link that Joshua sent you, approximated by cos(lat)*meters/deg where latitude is your approximate latitude and meters/deg is the conversion at the equator. This equates to the distance along a parallel for the spherical earth that W.H refers to (about 111,111 meters per degree at the equator)

see coordinate system - Algorithm for offsetting a latitude/longitude by some amount of meters - Geographic Information Syst… and Length Of A Degree Of Latitude And Longitude Calculator

I suspect that the data distributed is either 1, 2, 5, 10, etc meters and any representation in decimal degrees is done solely to provide consistency with the base units