Hi,
I am using in my workflow gIntersection from sp package. Part of my
relevant sessionInfo is:
R version 4.0.3 (2020-10-10)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 17763)
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] CircStats_0.2-6 boot_1.3-25 MASS_7.3-53 stringr_1.4.0
[5] rgeos_0.5-5 maptools_1.0-2 rgdal_1.5-18 raster_3.3-13
[9] sp_1.4-4
So i am using 2 SpatialLinesDataFrame that are results of previous
computation. I am not sure i can give a viable examples, but maybe this can
be solved without. If not i will figure out how i can give you a workable
example. Or if you know if there are in R already loaded 2 different line
shapefiles with projection then i will see if i can replicate this problem.
So, first file:
buff
class : SpatialLinesDataFrame
features : 1
extent : 560525.5, 561302.4, 4698908, 4701110 (xmin, xmax, ymin,
ymax)
crs : +proj=utm +zone=16 +datum=WGS84 +units=m +no_defs
variables : 2
names : ID, buff_dist
value : 2, 135
second file:
pln
class : SpatialLinesDataFrame
features : 1
extent : 560615.6, 560705.4, 4698905, 4699180 (xmin, xmax, ymin,
ymax)
crs : +proj=utm +zone=16 +datum=WGS84 +units=m +no_defs
variables : 2
names : x, y
value : 560615.564407584, 4698904.71208346
Please observe that both files have identical projections.
p1 <- gIntersection(buff, pln)
Warning message:
In RGEOSBinTopoFunc(spgeom1, spgeom2, byid, id, drop_lower_td,
unaryUnion_if_byid_false, :
spgeom1 and spgeom2 have different proj4 strings
This warning is baffling since both files have same projection:
crs(buff)
CRS arguments:
+proj=utm +zone=16 +datum=WGS84 +units=m +no_defs
crs(pln)
CRS arguments:
+proj=utm +zone=16 +datum=WGS84 +units=m +no_defs
Probably i am doing something wrong but for the life of me i cannot see it
as yet.
Thanks so much for any help, take care,
Monica
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