DEM Maps
- Thread starter tankbob
- Start date
G'day tankbob,
Sir, nobody is ..."...too thick...".. to use TransDEM!! Crickey, I'm as thick as three planks and yet I am one of Roland's 'favourite' students...
...there is a radio commercial getting plenty of airplay here in Melbourne at the moment for a company that sends their employees around to people's houses to teach them how to use computers and other modern technology. Their catchphrase is...
..."...its not that you can't, it's just that you haven't been shown how..."...
...to answer your question, however, I do have a number of UK based 'ready to go' DEM "maps" in my 'collection' but it should be remembered that these have been 'provided' as specific requests by others and are not 'really' for general 'release' (such as the ones for the U.S.by "fishlipsatwork" available from the Download Station. I would be loathe to 'open' these for general use without the permission of the original requester. Mind you, none of them may be 'suitable' for your specific requirements...
Jerker [
}
Sir, nobody is ..."...too thick...".. to use TransDEM!! Crickey, I'm as thick as three planks and yet I am one of Roland's 'favourite' students...
...there is a radio commercial getting plenty of airplay here in Melbourne at the moment for a company that sends their employees around to people's houses to teach them how to use computers and other modern technology. Their catchphrase is...
..."...its not that you can't, it's just that you haven't been shown how..."...
...to answer your question, however, I do have a number of UK based 'ready to go' DEM "maps" in my 'collection' but it should be remembered that these have been 'provided' as specific requests by others and are not 'really' for general 'release' (such as the ones for the U.S.by "fishlipsatwork" available from the Download Station. I would be loathe to 'open' these for general use without the permission of the original requester. Mind you, none of them may be 'suitable' for your specific requirements...
Jerker [
}cascaderailroad
New member
To me one of the most difficult to understand is: where to download map data, which type of data, and the format of data
Hi Tankbob. Ive been using Transdem for a little while now and once you have been through the tutorials a couple of times its not too difficult to do. You can download the data for the dems from the OS website but you will need to process it through transdem to use it. Give it a try and if you get stuck let Roland know where you are having problems and he will guide you through it.
When I read "DEM map" I automatically associate the term with a geo data resource. Well, in Trainz routes are often called maps, too. And in this case they are not cartographic maps. DEM, as Digital Evelvation Model, or DTM (Digital Terrain Model) in the UK, are also maps, with a single feature: height. Can be easily confused. But as these topics have been around here for more than a decade now, one should be able to find explanations, glossary of terms, tutorials or links to resources in abundance. The TransDEM forum, linked to in the signature of all my postings, is one such source of information.
By the way, and not yet listed in the resource section of the TransDEM forum, the Brits have a new DEM data set. It's called OS Terrain 50, and is supposed to supersede Land-form Panorama which is no longer maintained. Resolution and data format is the same as before, but the download is significantly smaller, as you can explicitly select the grid format.
Looking at all your posts in this field, you must be following the geo data topics for several years now. And you must have come across the mentioning of The National Map Viewer (TNM), as the portal to all sorts of US digital cartography, from hi-res DEMs to historical topo maps. There is also more than tutorial on how to use TNM for TransDEM.
By the way, and not yet listed in the resource section of the TransDEM forum, the Brits have a new DEM data set. It's called OS Terrain 50, and is supposed to supersede Land-form Panorama which is no longer maintained. Resolution and data format is the same as before, but the download is significantly smaller, as you can explicitly select the grid format.
Looking at all your posts in this field, you must be following the geo data topics for several years now. And you must have come across the mentioning of The National Map Viewer (TNM), as the portal to all sorts of US digital cartography, from hi-res DEMs to historical topo maps. There is also more than tutorial on how to use TNM for TransDEM.
G'day frogpipe,
...it would seem that your question has become 'lost' in the melee, here but with tankbob's enquiry effectively covered, I am able answer yours with a resounding, yes. The DEM (being Digital Elevation Modelling) data for ALL of Switzerland is available (at least, when I last sourced 'some') from a number of different locations, depending upon the resolution you require. To obtain the more common 30 meter (3 arcsec) resolution, there are a few possibilities, my preferred option, being the LPDAAC (by far the easiest to access) but you do need to register to download the data. If you want slightly better resolution than that, however, I can recommend the data available from "viewfinderpanoramas.org" (although, without actually checking, I could not be certain the area you seek is covered by them - I only know they have a large swathe of Switzerland covered in the 1 arcsec resolution), although it is a bit tricky to find the area you want from thier somewhat 'confusing' lists...
...knock yourself out...
Jerker {}
...it would seem that your question has become 'lost' in the melee, here but with tankbob's enquiry effectively covered, I am able answer yours with a resounding, yes. The DEM (being Digital Elevation Modelling) data for ALL of Switzerland is available (at least, when I last sourced 'some') from a number of different locations, depending upon the resolution you require. To obtain the more common 30 meter (3 arcsec) resolution, there are a few possibilities, my preferred option, being the LPDAAC (by far the easiest to access) but you do need to register to download the data. If you want slightly better resolution than that, however, I can recommend the data available from "viewfinderpanoramas.org" (although, without actually checking, I could not be certain the area you seek is covered by them - I only know they have a large swathe of Switzerland covered in the 1 arcsec resolution), although it is a bit tricky to find the area you want from thier somewhat 'confusing' lists...
...knock yourself out...
Jerker {
}