Properly Printing Portable Documents

Those of you who know and use GeoPDF technology for producing high-quality maps from ArcGIS have probably ended up with low resolution background imagery at some point or another. This happens even though you have 1 foot pixel or better aerial photography that you would otherwise expect to see someone sitting on a park bench. Why is that? ArcGIS uses a print driver to produce PDFs which means that you have to account for dots per inch (DPI) rather than the actual spatial resolution (GSD) of your input data. Hopfully these next few steps will help you produce better GeoPDFs...

1. In ArcGIS, select File --> Page and Print Setup
2. Find the total rows and total columns for your input image and divide each by your default DPI. For example, my NAIP image for Cobb County GA is 10000 x 15000 pixels. (10000/300 DPI and 15000/300 DPI) == 33.33 inches x 50 inches.



3. Save the settings and export your data from Map2PDF for ArcGIS and you will see a GeoPDF that is pretty close to the resolution of your input data set...

GeoEye-1 Launch Announcement

GeoEye-1 is set to launch on August 22, 2008 and it looks like this satellite is going to surpass the imaging capabilities of IKONOS and QuickBird. We on the commercial side will get half meter resolution while the DoD folks get about 16 inches with a return time of <3 days. It will also collect in three camera modes, panchromatic only, multispectral, and then simultanious panchromatic and multispectral (pan-sharpened). It looks like it will also collect in stereo...

Hopefully, data on the commercial side will be affordable or at least help to drive its competitors to lower their prices! Visit the GeoEye website for more details...