On 6/3/2012 10:59 AM, George Demmy wrote:
David Strip wrote:
> When used in conjunction with the (free) TerraGo toolbar, the geoPDF
> provides many more capabilities than a geo-spatial pdf, especially if the
> pdf "modify" permission is set.
As of version 6 which shipped recently, the TerraGo Toolbar offers
continuous display of coordinates and other functionality for any
geospatial PDF as long as it can grok the encoding. It supports OGC
and ISO and uses proj4 via GDAL under the hood for projections. Like
Reader, Toolbar has some more advanced functionality that is
accessible if certain permission bits are set.
While V6 of the toolbar (and in fact previous versions) provide
continuous display of coordinates, a "true geoPDF" (which I believe
means having the LGIDict), has far more coordinate conversion
capability, as well as the ability to add "geo-marks", geo-located
stamps (icons) added to the file. I verified this by downloading the
latest version of the Terrago Toolbar (15.0.0.591). I opened a
geo-spatial pdf that I created with ArcMap 10.0.2. I can get the
position display in Lat/Lon and MGRS at the bottom of the image, and in
the Geolocator tool (from the toolbar), I can also see UTM13N, WGS84,
USNG, and MGRS. I can't use the GeoMark tools at all. I then open a
geoPDF (a new generation USGS topo map). In this case I can set the
GeoLocator projection to display in any of a hundred or more predefined
projections, or define my own projection parameters. I can also mark the
map with GeoMarks. The ability to use GeoMarks is not a function of the
pdf "modify" bit being set. It is set in the ArcMap generated map, which
I can add non-geospatial marks with other pdf tools.
I belief that the presence of the LGIDict is what enables these other
features, but I could be wrong. That's something I've been trying to
find out.
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