LizardTech’s LiDAR Compressor can convert cloud data into MrSID files that retain 100 percent of the original raw data at just 25 percent of the file size, according to the company. Derivatives can be extracted repeatedly from LiDAR files compressed to MrSID, LizardTech said. It can also reportedly reduce LiDAR file sizes by up 90 percent with no perceptible loss.... read more
In my column earlier this month, I discussed the use of consumer GPS receivers for GIS data collection. Remember the analogy I used?a Volkswagen Beetle wasn?t designed to run in a Formula One race? This column is going to focus on the Formula One cars, not the Volkswagen Beetles. In other words, it will focus on the GPS receivers on the market that are designed for GIS data collection. I will refer to them as GPS/GIS receivers. read more
Three categories of GPS are used to populate GIS databases: consumer-grade receivers, GPS receivers designed specifically for GIS data collection, and survey receivers. This month, I discuss consumer-grade receivers. In a new issue in two weeks' time, I?ll cover the class of GPS receivers designed specifically for GIS data collection. read more
A Preliminary Analysis of SVN49’s Demonstration SignalGreat excitement surrounds the activation of a new transmitter from a satellite — an occasion dubbed first light. Research groups around the globe joined the GPS Wing in monitoring and analyzing the first L5 signals from space. We describe the equipment and procedures used to capture and analyze SVN49's signals and give an assessment of their characteristics. read more
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