Fair enough. So, where tl_2010_06_bg10.shp is the tigerlines file for
CA from the 2010 census (I think)...
$ ogrinfo -so tl_2010_06_bg10.shp tl_2010_06_bg10
INFO: Open of `tl_2010_06_bg10.shp'
using driver `ESRI Shapefile' successful.
Layer name: tl_2010_06_bg10
Geometry: Polygon
Feature Count: 23212
Extent: (-124.482003, 32.528832) - (-114.131211, 42.009517)
Layer SRS WKT:
GEOGCS["GCS_North_American_1983",
DATUM["North_American_Datum_1983",
SPHEROID["GRS_1980",6378137,298.257222101]],
PRIMEM["Greenwich",0],
UNIT["Degree",0.017453292519943295]]
STATEFP10: String (2.0)
COUNTYFP10: String (3.0) <-----County FIPS code
TRACTCE10: String (6.0)
BLKGRPCE10: String (1.0)
GEOID10: String (12.0)
NAMELSAD10: String (13.0)
MTFCC10: String (5.0)
FUNCSTAT10: String (1.0)
ALAND10: Real (14.0)
AWATER10: Real (14.0)
INTPTLAT10: String (11.0)
INTPTLON10: String (12.0)
COUNTYFP10 is the county FIPS code. So to limit the output by county,
say Alameda which has a county FIPS code of 001 (these are in wikipedia
and other sites, just google)...
ogr2ogr -f KML test.kml tl_2010_06_bg10.shp -where "COUNTYFP10 = '001'"
That results in a 2MB KML file which loads fine for me. The where
clause is just SQL, so you can put whatever criteria you want, or
multiple counties with "COUNTYFP10 in('001','002',...)"
Failing that, uDig is a pretty cool (and free) GIS tool that lets you
perform basic GIS functions, like union.
GIS! Where there's a geek, there's a way! ;-)
-Kristian
On 08/11/2014 11:45 AM, Cameron Crum wrote:
Kristian et al,
While the ogr2ogr would work, this would require having the blocks in
individual shape files if you wanted only a few. I think you can only
get them as a shape (for free anyway) by whole state...could be wrong.
That would either create a very large kml, which may not load in a
google map, or could eat a lot of memory in google earth. i.e. Texas
has almost 1 million blocks. I'm not sure you could load that many
objects into either program although I haven't tried. Using a GIS tool
to only select the ones you need and export to KML might be a better
approach for those only needing a few blocks mapped. It might be well
worth the time to have Brian or another GIS competent person do it for
you.
On Mon, Aug 11, 2014 at 12:36 PM, Kristian Hoffmann
<[email protected] <mailto:[email protected]>> wrote:
Specifically...
ogr2ogr -f output.kml input.shp
-Kristian
On 08/11/2014 09:00 AM, Sam Tetherow wrote:
ogr2ogr will do all sorts of Geo formats, geojson, tiger shape,
kml, kmz.
On 08/11/2014 10:24 AM, Gino Villarini wrote:
Anyone has a way to convert files for google earth evaluation?
Gino A. Villarini
President
Aeronet Wireless Broadband Corp.
www.aeronetpr.com <http://www.aeronetpr.com>
@aeronetpr
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