I am having trouble using get.arcdata() in RArcInfo. X and y coordinates
are not what they should be. Can anyone suggest what might be wrong?
I am using RArcInfo 0.4-1.
Here is the metadata of my coverage, using describe in Arc:
Arc: describe stdir_6
Description of SINGLE precision coverage stdir_6
FEATURE CLASSES
Number of Attribute Spatial
Feature Class Subclass Features data (bytes) Index? Topology?
------------- -------- --------- ------------ ------- ---------
ARCS 815 60
SECONDARY FEATURES
Tics 4
Arc Segments 2208
TOLERANCES
Fuzzy = 5.000 N Dangle = 0.000 N
COVERAGE BOUNDARY
Xmin = 532929.625 Xmax = 582929.625
Ymin = 116877.102 Ymax = 142877.109
STATUS
The coverage has not been Edited since the last BUILD or CLEAN.
COORDINATE SYSTEM DESCRIPTION
Projection STATEPLANE
Zone 5626
Datum NAD83
Units METERS Spheroid GRS1980
Parameters:
When I execute the following and do a plotarc() or look at the lists containing
the
x and y coordinates, all I see is garbage--the coordinates are all infinitesimal
or
extremely large numbers (e.g., -8.928678e-31, 9.784083e+15).
stdir6 <-
get.arcdata("/projects/cold_creek/grid/watershed/dhsvm_200m",
"stdir_6", filename="arc.adf")
plotarc(stdir6, new=T)
stdir6[[2]]
On the advice of Virgilio, I converted my Arc v.8x coverage into v.7x, but
that made no difference (ESRI documenation says they should be the same anyway).
Scott Waichler
Pacific Northwest National Lab
Richland, Washington, USA
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