Better print method for Spatial*DataFrames?

Nice suggestion! I did this for points (committed to cvs), as option in
print, and get
options(width=60)
print(meuse[1:3,], sWKT=T)
geometry cadmium copper lead zinc  elev
1 POINT(333611 181072)    11.7     85  299 1022 7.909
2 POINT(333558 181025)     8.6     81  277 1141 6.983
3 POINT(333537 181165)     6.5     68  199  640 7.800
        dist   om ffreq soil lime landuse dist.m
1 0.00135803 13.6     1    1    1      Ah     50
2 0.01222430 14.0     1    1    1      Ah     30
3 0.10302900 13.0     1    1    1      Ah    150

For (multi)lines / polygons, would it be useful to print the first
coordinate followed by ..., so that some kind of identification is possible?
Currently if I print a spatial polygon data frame I get the list
representation, which almost always scrolls way of the screen as giant
lists of lists of coordinates whizz past. It's nearly always useless
and luckily ESS lets me C-c C-o and zap the output. For
SpatialPointsDF you get:

        coordinates letters LETTERS
1    (1, 0.0486677)       a       A
2     (2, 0.520911)       b       B
3     (3, 0.207873)       c       C
4     (4, 0.466571)       d       D

- for spatial polys and lines would it be better to have such a
compact representation as the default print? I'd rather use the word
'geometry' and have it print as a (truncated) pseudo-WKT, something
like:

     geometry letters LETTERS
1   POINT(1  0.0486677)       a       A
2   POINT(2  0.520911)       b       B

 for points, and:

     geometry letters LETTERS
1   LINESTRING(...)       a       A

 for lines, and:

     geometry letters LETTERS
1  POLYGON(...)       a       A

 for polygons. Or MULTIPOLYGON, whichever is appropriate. I think it
should literally print dot-dot-dot, since for anything other than
points its going to be voluminous.

Today I am a random idea factory...

Barry

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Edzer Pebesma
Institute for Geoinformatics (ifgi), University of M?nster
Weseler Stra?e 253, 48151 M?nster, Germany. Phone: +49 251
8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
http://www.52north.org/geostatistics      e.pebesma at wwu.de

Better print method for Spatial*DataFrames?

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