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Everything posted by GISPro

  1. I've got a Magellan SporTrak Pro - but would be happy with any WAAS enabled unit that had a background map. I've also used the college's DGPS survey unit for class demonstrations. Now THOSE are accurate points!!!!
  2. Is it possible to either A) note on a site's data page whether the coordinates are are are not WAAS corrected or notify the owner of the site with more accurate coordinates. I'm getting frustrated finding cahces that are 50 feet away from their coordinates! What do you think?
  3. Magellan just started a rebate on their products as follows: Any Magellan GPS receiver: $50 rebate MapSend product: $25 rebate Buy both and get a $75 rebate! I don't work for Magellan, but I sure applied for the rebate after buying a SporTrak Pro and MapSend.
  4. Check out this book: http://gis.esri.com/esripress/display/index.cfm?fuseaction=display&websiteID=40&moduleID=0 It covers how GPS works and more practical applications of the technology such as data analysis or location mapping. It also has a section on how to design a GPS mapping project. BTW - Ever been in the tunnel under Russell Hall?
  5. Check out this book: http://gis.esri.com/esripress/display/index.cfm?fuseaction=display&websiteID=40&moduleID=0 It has a good primer on how GPS works and good practical examples of how GPS technology is used in various mapping technologies. There's also a section on designing GPS projects for analysis.
  6. I didn't know the power requirements and wanted to avoid burning up the receiver. Now I am looking for a cig adaptor to step down the voltage to 3.8 . Thanks for the cautionary note!
  7. I saw this a few weeks ago and it seemed like a lot of trouble. Then I took a trip last week and realized that extended power would be great. Thanks!!!
  8. Who had the instructions for making a power adaptor to plug your SporTrak into the car's cigarette lighter socket? I lost the URL.
  9. I got the basic file on mine, and it contains state highways, Interstate Freeways, railroads, and some major city streets. It doesn't contain any local residential streets (like the one I live on). So I don't think you're missing anything!
  10. Check out this site: http://www.esri.com/industries/k-12/index.html It's got some good teaching materials as well as good ways to tie the use of GPS to map making.
  11. Even with WAAS, sport grade GPS doesn't come close to professional grade GPS. I have a unit that is +- 10" that cost over $8,000 ... the units that get centimeter accuracy required for land surveying cost over $20,000. If you are interested in the process that surveyors go through to recover benchmarks, check this on-line magazine: http://www.profsurv.com/ It very often has articles on rectifying older surveys with new technology.
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