[R-sig-Geo] read shapefile into R larger than 2GB

[Rainer M Krug]

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On 03/04/12 20:44, Carlos Valenzuela wrote:
> Hello all, I was hoping someone may be able to help me with this problem. I am trying to read a
> shapefile into R that is larger than 2GB. I?ve tried

In my opinion, a 2GB shape file is insane....

Is the attribute table (.dbf) file as big or is it the shp? If it is the .dbf, you have to look if
you need all attributes.
If it is the .shp, you could possibly split the shaope file in more then one actual layer?
Also, import into a SpatiaLite or even PostGIS database might help you - then you can easier
import a subset of features.

Cheers,

Rainer


> using readShapePoly() in spdep as well as the readOGR() in rgdal with no luck.,
> 
> Using the readShapePoly(), I get:, ?failed on DBF filefseek? on  a series of lines (over
> 284,000),
> 
> When using rgdal, I get this:
> 
> Warning message:, In readOGR(".", "nameoffiles") :, Deleted feature IDs: 284284, 284285,
> 284286, 284287, 284288, 284289, 284290, 284291, 284292, 284293, 284294, 284295, 284296, 284297,
> 284298, 284299, 284300, 284301, 284302, 284303, 284304, 284305, 284306, 284307, 284308, 284309,
> 284310, 284311, 284312, 284313, 284314, 284315, 284316, 284317, 284318, 284319, 284320, 284321,
> 284322, 284323, 284324, 284325, 284326, 284327, 284328, 284329, 284330, 284331, 284332, 284333,
> 284334, 284335, 284336, 284337, 284338, 284339, 284340, 284341, 284342, 284343, 284344, 284345,
> 284346, 284347, 284348, 284349, 284350, 284351, 284352, 284353, 284354, 284355, 284356, 284357,
> 284358, 284359, 284360, 284361, 284362, 284363, 284364, 284365, 284366, 284367, 284368, 284369,
> 284370, 284371, 284372, 284373, 284374, 284375, 284376, 284377, 284378, 284379, 284380, 284381,
> 284382, 284383, 284384, 284385, 284386, 284387, 284388, 284389, 284390, 284391, 284392, 284393,
> 284394, 284395, 284396, 284397, 284398, 284399, 284400, 284401, 284402, 284403, 284404, 284405,
> 284 [... truncated],
> 
> In other words, I only get half of the data imported into R and need to get all of it in.
> 
> Thank you,
> 
> Carlos
> 
> [[alternative HTML version deleted]]
> 
> 
> 
> 
> _______________________________________________ R-sig-Geo mailing list R-sig-Geo at r-project.org 
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo


- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys.
(Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel :       +33 - (0)9 53 10 27 44
Cell:       +33 - (0)6 85 62 59 98
Fax :       +33 - (0)9 58 10 27 44

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email:      Rainer at krugs.de

Skype:      RMkrug
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