Atterbury Consultants, Inc.
Professional Forestry Services
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Zooming and panning with the High Compression imagery is fast, even on a Pocket PC. Imagery does not include road, stream, ownership, or any other data layers LizardTech has a plug-in for Internet Explorer and Firefox that allows the viewing and printing of MrSid© files. The ExpressView Browser Plug-in can be found at www.lizardtech.com. Our dedicated 64 bit imagery processor is hard at work running LizardTech™ GeoExpress. Reprojecting and recompressing the new imagery into all of the different projections and compression ratios takes a tremendous amount of computer resources and time. Recompressing a single county from 15:1 to 100:1 can take several hours. Double if it is also reprojected at the same time. |
1 Meter Orthorectified Aerial Photography2009 NAIP Imagery for Oregon and Washington now available. See below to order Oregon NAIP See below to order Washington NAIP The original 2009 imagery is in MrSid© file format. All processed imagery is output in MrSid© file format unless otherwise specified. We are able to reproject and recompress the imagery to meet customer's needs. Selecting A Compression Ratio: File compression helps us store more information in smaller spaces. Some methods sacrifice a small amount of quality for speed and performance. The original NAIP imagery was compressed at a ratio of 15 to 1. This 'normal' compression ratio works well on a desktop PC, but the file sizes are too large for Pocket PCs like the Nomad or Nautiz. Even though one may be able to fit a 15:1 compressed county on their Pocket PC, the file will still bog down the processor. Recompressing the NAIP imagery to a higher ratio of 100 to 1 reduces the file size while preserving most of the quality. The smaller file size is easier to fit onto the memory of a Pocket PC and does not tax the processor as much. The increased compression shrinks file sizes to under one gigabyte and screen refresh rates become quicker. Recompressed NAIP imagery is slightly less sharp at 100 to 1, but offers a good performance solution for the Pocket PC. Selecting A Projection: Imagery may come in many different projections. The NAIP imagery was originally distributed in NAD 83, UTM, Zone 10 and 11 North with a unit of measure in meters. Atterbury Consultants uses NAD 83, state plane, Oregon North with a unit of measure in feet. The Washington State Department of Natural Resources uses NAD 83, HARN, state plane, Washington South with a unit of measure in feet. There are countless different projections, some more appropriate than others for a given area. It is advantageous to have all GIS data in the same projection. Even if the GIS software can compensate for different projections, difficulties can occur when using mismatched data. Handling multiple mismatched data layers uses more computer resources than necessary. Projection compensation may not be exact and could lead to the creation of errors in the data. Having the correct projection helps reduce problems in the workflow. |
The MrSid© file format:
Samples:
MrSid sample clips of the Washington NAIP imagery compressed at a ratio of 15 to 1.
MrSid sample clips of the 2009 Washington NAIP imagery compressed at a ratio of 15 to 1 and reprojected to NAD 83 Stateplane OR North with a unit of measure in feet.
MrSid sample clips of the 2006 Washington NAIP imagery compressed at a ratio of 100 to 1 and reprojected to NAD 83 Stateplane OR North with a unit of measure in feet. KMZ Sample clips of the 2009 and 2006 Washington NAIP imagery. Have fun comparing them to what Google Earth has!
2006 sample for Google Earth |
2009 Oregon NAIP Imagery by County - Normal Compression (15:1)-- $50.00
The original projection is in NAD 83, UTM, Zone 10 or 11 North with a unit of measure in meters.
Click on the drop down boxes to select different counties and projections.
2009 Oregon NAIP Imagery by County - High Compression (100:1)-- $40.00
The original projection is in NAD 83, UTM, Zone 10 or 11 North with a unit of measure in meters.
Click on the drop down boxes to select different counties and projections.
2009 Oregon NAIP Imagery - The Entire State -- $1,100.00
The original projection is in NAD 83, UTM, Zone 10 or 11 North with a unit of measure in meters.
Click on the drop down box to select different projections.
2009 Washington NAIP Imagery by County - Normal Compression (15:1)-- $50.00
The original projection is in NAD 83, UTM, Zone 10 or 11 North with a unit of measure in meters.
Click on the drop down boxes to select different counties and projections.
2009 Washington NAIP Imagery by County - High Compression (100:1)-- $40.00
The original projection is in NAD 83, UTM, Zone 10 or 11 North with a unit of measure in meters.
Click on the drop down boxes to select different counties and projections.
2009 Washington NAIP Imagery - The Entire State -- $1,100.00
The original projection is in NAD 83, UTM, Zone 10 or 11 North with a unit of measure in meters.
Click on the drop down box to select different projections.
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NAIP imagery on ArcPad 7