[gdal-dev] Relating to GeoLocation tool of Geospatial PDF Document

[Vankadara, Sunil]

Hi Jukka Rahkonen,

Thanks for the prompt information. My GDAL is not linked to proj4 libraries to use ISO32000 option. 
I am trying to link the GDAL with Proj4 and test the Geolocation workflow.

Regards
Sunil
-----Original Message-----
From: gdal-dev-bounces at lists.osgeo.org [mailto:gdal-dev-bounces at lists.osgeo.org] On Behalf Of Jukka Rahkonen
Sent: 07 April 2015 01:49:PM
To: gdal-dev at lists.osgeo.org
Subject: Re: [gdal-dev] Relating to GeoLocation tool of Geospatial PDF Document

Vankadara, Sunil <sunil.vankadara <at> hexagongeospatial.com> writes:

> 
> 
> 
> Hi Team,
>  
> I created a PDF file with OGC_BP as GEO_ENCODING option like shown in 
> the
 below command.  The below tif file’s Datum and Projection details are WGS84 /Geographic (lat/lon).
>  
> ./gdal_translate.exe -of PDF ../../Data/input/sample256x256_1.tif
../../Data/output/sample256x256_1.pdf -co GEO_ENCODING=OGC_BP -co COMPRESS=JPEG -co
>  PRODUCER="ERDAS IMAGINE" -co CREATION_DATE=D:20150407111345+02'00'
>  
> Looked at the created PDF file Metadata using QGIS tool and noticed 
> that
it is having the same datum and projection details as like below.
>  
> Layer Spatial Reference System
> 
> +proj=longlat +datum=WGS84 +no_defs
> 
> Layer Extent (layer original source projection)
> -84.5046451524118538,34.1200924180016969 :
-84.5042907999925177,34.1204467704210259
>  
> When I tried to use the Geospatial Location tool
(Edit->Analysis->Geospatial Location Tool ) in the Adobe PDF Reader then the empty lat/long values are displaying at the right bottom of the  document.
> Am I missing anything in creating the Geospatial PDF document ? How to
confirm whether the CRS information is written into the PDF document or not?
> How GDAL PDF handles in case the given projection is not supported by 
> the
driver?

Hi,

Don't use the -co GEO_ENCODING=OGC_BP option alone if you want to show coordinates with standard Acrobat viewer without the TerraGo toolbar. Use the default which means ISO32000, or BOTH.

Confirm the result with gdalinfo "gdalinfo output.pdf". If source SRS is not recognized define it explicitly by using parameters -s_srs and -t_srs.
Alternatively you can just attach SRS to output with -a_srs.

-Jukka Rahkonen-
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