Hi John,
Possibly what you're looking for is in the geosphere package
(https://cran.r-project.org/web/packages/geosphere/geosphere.pdf).
Cheers,
Loïc
On 07/31/2015 04:47 PM, john d wrote:
Dear all,
Here's another issue that I've been struggling with and I'd really
appreciate any input.
I want to compare the latitudinal and longitudinal extents of different
shapefiles. Comparing latitudes is straightforward because they are
measured as parallels, so they are "self-referential". However, measuring
longitudes is always tricky because, as they are represented as meridians,
longitudinal degrees always depend on their latitude.
Is there a way to represent longitudes that is also self-referential?
Perhaps some transformation?
Any discussion in this respect will be greatly appreciated.
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