[Gdal-dev] Measured Values for Shapefile read & write

[Dylan Beaudette]

Sounds like there was some kind of NADGRID mixup.... ? where you projecting 
across datums?

cheers,

Dylan

On Tuesday 24 July 2007 11:34, Nelson, Dean wrote:
> Craig,
>
> We would like our product to ingest any type of shape file (projected or
> lat/lon) and be able to run with it. However, as in the "[Gdal-dev] Is
> ogr2ogr the tool to use?" thread, I have some shapefile data from the
> USGS/Hydro1k project that is projected from a point and all of the
> values in the polygons are x,y values. I needed to convert to a Lat/Lon
> shapefile. I did it via ogr2ogr and the resulting output was placed 17km
> north of reality.
>
> I was looking for a kludgy fudge factor ;-)
>
>
>
> Regards,
>
> Dean Nelson
> Enterprise Electronics Corp
>
>
> 	-----Original Message-----
> 	From: Craig Hunter [mailto:craigrthunter at gmail.com]
> 	Sent: Tuesday, July 24, 2007 12:52 PM
> 	To: Nelson, Dean
> 	Cc: gdal-dev at lists.maptools.org
> 	Subject: Re: [Gdal-dev] Measured Values for Shapefile read &
> write
>
>
> 	Dean,
>
> 	Are you referring to an offset, in the sense you have a point on
> a line and you want to project it 100 meters off to the left side (90
> degrees) of the line?  In that case, no, but I'm pretty sure that can
> already be performed with the ogr library as it is now.
>
> 	I'm referring to measured values (M-values) that are included in
> the geometry and can be used for dynamic segmentation.
>
> 	(Sorry for the repeated message, I left the mailing list off my
> initial reply)
>
>
> 	On 7/24/07, Nelson, Dean <dean.nelson at eecradar.com> wrote:
>
> 		Craig,
> 		Would this be like a projected shape file (i.e. x,y off
> of a median) ?
>
>
> 		Regards,
>
> 		Dean Nelson
> 		Enterprise Electronics Corp
>
>
>
>
> 			-----Original Message-----
> 			From: gdal-dev-bounces at lists.maptools.org
> [mailto:gdal-dev-bounces at lists.maptools.org] On Behalf Of Craig Hunter
> 			Sent: Tuesday, July 24, 2007 11:25 AM
> 			To: gdal-dev at lists.maptools.org
> 			Subject: [Gdal-dev] Measured Values for
> Shapefile read & write
>
>
> 			Hi,
>
> 			I performed a hack to the OGR source in order to
> read and write shapefiles with measured values.  If others may find this
> of value, I'll work on a patch?
>
> 			Also, the SDE driver only provides read access.
> Is there some technical or proprietary issues with performing write
> access to SDE? or has this not been developed due to a lack of interest?
>
> 			Thanks,
> 			Craig Hunter.