The Illinois State Library has purchased all Illinois Digital Orthophoto Quadrangles (DOQs) that the U.S. Geological Survey produced on CD-ROM for 1988, 1993, and 1998. The DOQ's are in GeoTIFF format.

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No viewing software is included on the CD-ROMs. An evaluation copy of the Global Mapper viewing software (formerly dlgv32 Pro) can be downloaded from Blue Marble Geographics'. The DOQs on CD-ROM are based on three NAPP (National Aerial Photography Program) flights in Illinois: 1988, 1993, and 1998. The 1988 and 1993 flights were not completely converted to DOQs so coverage is only select.

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• Explanation The DOQs are arranged on the CD-ROMs by file number, not alphabetically by quad name, nor by the 5-digit block number from the topographic map index. To find a DOQ for a specific quarter quad, State Library staff created this alphabetical index, translating the quad name to CD-ROM file. The left hand column is the name of the quad. The next column to the right is the quarter quad, i.e., NE, NW, SE, or SW. The third column to the right 'flight date' is the date of the aerial photography on which the DOQ is based. Some quads have more than one flight, but they are integrated by the quad name.

The fourth column to the right is the 'series' and 'file' numbers. Because the State Library purchased these DOQ's in several different orders, USGS numbered the 'files' beginning with one for each order. Therefore, a 'series' was necessary as well.

The fifth, and last, column to the right 'data file' is the 5-digit block number, plus a 1, 2, 3, or 4 for the specific quarter: 1= NW, 2 = NE, 3= SE, and 4 = SW. You need a series and file number to get to the right CD-ROM and the 5-digit block number to get to the right data on the CD-ROM. The call number for these CD-ROMs is: SOFTWARE I 19.124/13: Ser. [no.]/File [no.] Note: The State Library owns the 2005 statewide digital orthoimagery as well. For more information, or for a print version of the index to the DOQs on CD-ROM, please call 217-782-7596 or email.

We’ve updated our sample page to include a project with the high resolution Red Rocks virtual reality scene. We’ve also added a download link to the.OBJ,.MTL and.PLY files for import into Unity3D or other 3D rendering software. Creating real world scenes in VR quickly from drone imagery is possible using an oblique collection and our processing software.

The image above shows a 3D Textured Mesh Point Cloud converted to.OBJ format displayed in Blender. The.OBJ has an associated.MTL and.JPG file to provide the texture and material mapping. We’d love to see how you use this data in your own projects! Here we show a set of illustrations for a crop seed research field imaged with a modified near infra-red sensor. The first image shows the scene in the infra-red and the second shows the computed scene gNDVI. The research field was outfitted with a unique set of controls.

Aerial targets on the ground provided calibrated spectral reflectance as well as precise geo-spatial position. These were used over the 17 week growing period (on a weekly basis) in order to produce a meaningful temporal history of the research crop maturation. The third image shows the automated binning of the plot average vegetation indice with color highlighting high indice (green) to low (red).