Message Areas - "UTM file format"

Train-Sim.Com Message Areas

"UTM file format"

Email this topic to a friend
Printer-friendly version of this topic
Bookmark this topic (Registered users only)
Previous Topic | Next Topic Conferences MSTS Route Design (Protected) Original message
richrailart (26 posts)
Aug-03-01, 07:27 PM (EST) "UTM file format" Can someone please explain the UTM xyz format ? The third column is, I assume, level, but what are the other two ? I assumed latitude and longitude, but while the DTED data for Scotland produces a basic but useful relief map in microdem, it seems in the wrong place using Johns terrain extractor. Alert Edit | Reply | Reply With Quote | Top
Table of Contents

Subject Author Message Date ID RE: UTM file format jvizoso Aug-03-01 1 RE: UTM file format richrailart Aug-04-01 2 RE: UTM file format wildh0rse Aug-04-01 3 RE: UTM file format richrailart Aug-04-01 4

Lobby | Topics | Previous Topic | Next Topic
Messages in this topic
jvizoso (34 posts)
Aug-03-01, 09:49 PM (EST) 1. "RE: UTM file format" I just did a search for you..... the info you seek is here
http://www.train-sim.com/dcforum/DCForumID6/621.html
post # 34
Try doing the search yourself next time this board now has so many pages it's almost certain any question has already been answered ... jv Remove | Alert Edit | Reply | Reply With Quote | Top
richrailart (26 posts)
Aug-04-01, 05:58 AM (EST) 2. "RE: UTM file format" Sorry, but my question is not answered.
The first two columns in my UTM file do not make sense, the third one does, and Terrain Extractor V0.5 does not work.Ist line of file
0.0 6122638.6 275
last line of file
353661.4 6472327.0 0 Any ideas ? Remove | Alert Edit | Reply | Reply With Quote | Top
wildh0rse (114 posts)
Aug-04-01, 08:20 AM (EST) 3. "RE: UTM file format" UTM stands for (i THINK) Universal TRansverse Mercator... and what it is is a grid system to supplant the ol' Degrees/Minutes/Seconds sytem with something easier to adapt to a map.Two values are called Northing and Easting, respectively. There is a prefix value to tell you where on the planet to look (18T is mine here in northern NY). The Numbers then follow like so:04 28 459.65
51 36 334.95These are grid designations, and a good map will have the grids on them already. The last three digits before the decimal point actually shows how far in meters from the north and east you are from a grid line.If you do any land navigation or sea navigation, you'll see how awkward and clumsy degree/m/s calculations get. With UTM all you need is a ruler and you can find any coordinate set in a jiffy. In fact all the numbers in utm coord's designate distance in meters from a fixed point. There is also a MGS or military grid system which is almost exactly the same.And a word of caution for all DEM users: If your looking at a paper topo map too, be sure that both are using the same "datum", ie topo data friom the same survey (no the earth didn't really move areound in 60 years, the surveys got more accurate lol)Wh
Remove | Alert Edit | Reply | Reply With Quote | Top
richrailart (26 posts)
Aug-04-01, 09:16 AM (EST) 4. "RE: UTM file format" Thanks - the UTM conversion is definitely wrong, I realise now what I should be doing. Remove | Alert Edit | Reply | Reply With Quote | Top

Lock | Archive | Remove

Lobby | Topics | Previous Topic | Next Topic