[Gdal-dev] convert a group of points (lat, lon) to a shape file

[Pericles S. Nacionales]

Greetings, Xiaodong!

I'm sure there are more than one way to do it but in the past this is 
what I've done (this is the ESRI generate file format):

101
lon1,lat1
lon2, lat2
...
lonN,latN
END
102
lon1,lat1
lon2, lat2
...
lonN,latN
END
END

save it as a file and you can then find the gen2shp utility somewhere 
(or the gen2shp extension for ArcView3) and convert it to a shapefile. 
Or you can use Arc/Info "generate" to create a coverage.  The example 
above will give you two polygons with IDs 101 and 102.  I haven't done 
this in years so my memory might be a little hazy.

If ogr2ogr supports it, that would be even better!

I hope that helps.

-Perry

Xiaodong Zhang wrote:
> Hi,
> 
> I have a humble question which may have been answered before, but could 
> anybody please kindly help out. The question is:
> 
> If I have a series of points, say in a text file, like
> lat1, lon1
> lat2, lon2
> lat3, lon3
> lat4, lon4
> 
> How should I format the text file such that an ogr utility (e.g., 
> ogr2ogr) can convert it into a shapefile as a polygon.
> 
> Many thanks
> Xiaodong
> 
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