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LizardTales Newsletter - April 2008
In This Issue
Geospatial - Exploring the new features in GeoExpress
If you've ever received imagery from the USDA NAIP program, particularly MrSID Generation 2 images from previous years, you'll have noticed that many of the images have black collars around them. If you load these images into your GIS application and drop out these black collars, you'll see a lot of ugly "speckling." These speckling artifacts happen because compressing images to MrSID at high compression ratios requires approximating colors. In other words, "black" becomes "almost black." While the human eye doesn't ordinarily notice the difference, this can make it difficult, not to mention ugly, to mosaic images together. Not to fear, though, as GeoExpress 7 has new "despeckling" tools to clean these images up. Start GeoExpress, and add your SID files to the "Despeckle" tab. In most cases, you won't even need to adjust any options. Just choose "Despeckle Selected Images" and GeoExpress will clean up your images for you. Another popular workflow with GeoExpress 7 uses two new features: output tiling and decoding. Lots of customers have massive SID images that they need to chop up into smaller tiles and decode out to TIFF. In prior versions of GeoExpress, you could use a series of command line tools to do this, but of course this was unwieldy. Here's how easy it is do to in GeoExpress 7: Add the file(s) you want to work with to the "Images" tab. Select "Tools | Image Crop..." In the "Output Tiling" section, choose how many rows and columns you want to divide your image into, and click "OK." Now, just choose "GeoTIFF" as your output format and select "Encode Selected Images." In no time, you'll have a series of GeoTIFF tiles created from your original SID image. These are just a few of the features customers have told us have been most valuable to them; we're sure you have your favorite new features as well. Feel free to let us know how you're using GeoExpress 7 by emailing us at info@lizardtech.com, or by participating in our recently launched 2008 geospatial products survey. All survey participants are automatically entered to win a $50 gift card for Amazon.com.
Where Is LizardTech?
Fun Discoveries
Case Studies and Customer Wins Recently California-based GIS Planning, Inc, which creates user-friendly GIS applications on the Web, purchased GeoExpress and Express Server 6 in order to compress, host and serve large amounts of aerial imagery for dozens of hosted client Web applications. GIS Planning was looking for a solution to quickly configure and deploy large image data sets for customers and easily update existing image catalogs with new imagery. In addition, the company needed to improve performance when displaying high resolution imagery at different extents and improve the refresh time of ArcIMS map services that use raster imagery. LizardTech Express Server met those requirements and has proven to be a very effective solution for GIS Planning. Deployment and management of image data is much more efficient now, and the performance in their Web applications using imagery has improved, the company stated. Here is a partial list of recently added clients to our ever expanding customer base: North America
Federal
Latin America
EMEA
Reseller News LizardTech has recently signed a reseller agreement with proSPATIAL, LLC, a Denver-based geospatial technology firm, to serve as a distributor of the LizardTech Express Suite consisting of GeoExpress, Express Server and Spatial Express. We are very excited to welcome proSPATIAL to our ever expanding network of resellers!
Tips and Tricks
Tip:
Do you need to downsample your MrSID Generation 3 images? Use the optimizer - it's a quick process! Let's say you have images with a resolution of .5 meters per pixel and you wish to resample it to 2 meters per pixel:
Hot Tips? Do you have tips that you want to share? Send them to suggestions@lizardtech.com and we might publish your tip in the next issue of LizardTales.
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