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#1
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US/Canada Border Data for SeeYou, etc.
Hello All,
On a suggestion from Dave Nadler I've posted US/Canada border information in Tim Newport-Peace and OpenAir formats on my website at http://www.soaringdata.info. I'll probably get around to doing US/ Mexico the next time the weather is crummy in my neck of the woods. The border data is converted from lists of survey points published by the US/Canada Border Commission. I've degranualized it to make it much smaller while still maintaining an accuracy of +/- 500 ft or so. I've expressed the result in closed polygon form to make it compatible with programs such as SeeYou that have trouble with linear border data. There are four sections in the file so that you don't have to load the entire border if you don't want to -- just throw away the unneeded portions using a text editor. As the regular readers on this forum already know, my website also includes current sectionals in .cmr format for SeeYou for the entire continental US. It has comprehensive airspace data taken from the National Airspace System Resource files in TNP and OpenAir formats. There is also a dynamic waypoint file generator that can merge contest or recreational turnpoint lists (such as those on the Worldwide Soaring Turnpoint Exchange) with current airport data taken from the NASR database. Four different output formats are supported that cover nearly every instrument or software program. All of this is taken from public sources, is free of charge, and is freely redistributable. Happy Downloading! Lynn Alley '2KA" Lynn Alley |
#2
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US/Canada Border Data for SeeYou, etc.
On May 1, 1:37*am, 2KA wrote:
Hello All, On a suggestion from Dave Nadler I've posted US/Canada border information in Tim Newport-Peace and OpenAir formats on my website athttp://www.soaringdata.info. *I'll probably get around to doing US/ Mexico the next time the weather is crummy in my neck of the woods. The border data is converted from lists of survey points published by the US/Canada Border Commission. *I've degranualized it to make it much smaller while still maintaining an accuracy of +/- 500 ft or so. I've expressed the result in closed polygon form to make it compatible with programs such as SeeYou that have trouble with linear border data. *There are four sections in the file so that you don't have to load the entire border if you don't want to -- just throw away the unneeded portions using a text editor. As the regular readers on this forum already know, my website also includes current sectionals in .cmr format for SeeYou for the entire continental US. *It has comprehensive airspace data taken from the National Airspace System Resource files in TNP and OpenAir formats. There is also a dynamic waypoint file generator that can merge contest or recreational turnpoint lists (such as those on the Worldwide Soaring Turnpoint Exchange) with current airport data taken from the NASR database. *Four different output formats are supported that cover nearly every instrument or software program. *All of this is taken from public sources, is free of charge, and is freely redistributable. Happy Downloading! Lynn Alley '2KA" Lynn Alley Thanks Lynn ! See ya, Dave "YO electric" |
#3
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US/Canada Border Data for SeeYou, etc.
Lynn,
PLEASE let me know when you get around to the Mexico border! Your work is APPRECIATED! thank you! Thank you! Micki |
#4
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US/Canada Border Data for SeeYou, etc.
OK, I spent a few hours this afternoon and got Mexico done as well.
You can find links to borders for both at http://www.soaringdata.info. By the way, I spent some time comparing data from three different US Government sources. There are some significant differences -- on the order of 1000 feet or so -- especially along the river sections. I guess it is tricky to try to pin down the position of the river with a great deal of accuracy, as the meanders move over time. It is probably prudent to give the US-Mexico border a pretty wide berth when soaring in the area; some government official's map might not be exactly the same as yours! Lynn Alley "2KA" |
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