<div class="gmail_quote"><div><div class="h5"><div class="gmail_quote">On Tue, Jan 10, 2012 at 12:01 PM, Howard Butler <span dir="ltr"><<a href="mailto:hobu.inc@gmail.com" target="_blank">hobu.inc@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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On Jan 10, 2012, at 10:30 AM, Howard Butler wrote:<br>
> I'll try to dig into this some more...<br>
<br>
</div>GDAL isn't turning this into a proper proj.4 string.<br>
<br>
> GTModelTypeGeoKey (Short,1): ModelTypeProjected<br>
> GTCitationGeoKey (Ascii,14): "UTM zone 15N"<br>
> GeogGeodeticDatumGeoKey (Short,1): Datum_North_American_Datum_1983<br>
> GeogEllipsoidGeoKey (Short,1): Ellipse_GRS_1980<br>
> ProjectedCSTypeGeoKey (Short,1): PCS_NAD83_UTM_zone_15N<br>
> ProjCoordTransGeoKey (Short,1): CT_TransverseMercator<br>
> ProjLinearUnitsGeoKey (Short,1): Linear_Meter<br>
> VerticalCSTypeGeoKey (Short,1): VertCS_North_American_Vertical_Datum_1988<br>
> VerticalCitationGeoKey (Ascii,19): "GEOID 2003 Applied"<br>
> VerticalUnitsGeoKey (Short,1): Linear_Meter<br>
<br>
is coming out of GDAL as:<br>
<br>
> +proj=tmerc +lat_0=0 +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=NAD83 +units=m +geoidgrids=g2003conus.gtx,g2003alaska.gtx,g2003h01.gtx,g2003p01.gtx +vunits=m +no_defs<br>
<br>
note the parameters, they're all 0.<br>
<br>
I don't know whether or not this is a bad set (or incompletely specified) of GeoTIFF keys, or whether or not GDAL should be taking the ProjectedCSTypeGeoKey straight off, as this defines the coordinate system parameters fully via lookup. Frank, are you still around?<br>
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Howard_______________________________________________<br>
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<br>
</div></div></blockquote></div><br></div></div><div class="h5">(sorry, keep forgetting to CC the list on this).</div><div class="h5"><br></div><div>I should note that it's not only these files, it seems to be any that use anything other than WGS84.</div>
<div><br></div><div>For example, <a href="http://liblas.org/samples/test.las" target="_blank">http://liblas.org/samples/test.las</a> gives me issues (returning what looks like HUGE_VAL). </div>
<div>And <a href="http://data.capcog.org/Information_Clearinghouse/data/LiDAR/Fayetteville-SWB2.las" target="_blank">http://data.capcog.org/Information_Clearinghouse/data/LiDAR/Fayetteville-SWB2.las</a> seems to put me in the middle of the ocean.</div>
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