Okay- Transdem is pretty cool

devandavis

New member
For 20 years or so, I've wanted to model an old rail line that passed through my home town- one that was abandoned in the late 1930s. I finally came to the conclusion that virtual railroading was the only way I could even attempt this. After reading up on Transdem after buying trainz, I was happy to learn I could easily get the geography right. Info on the rolling stock is out on the internet, but getting the route was going to be tough.

Today, I found that the PUCO maintains a wms server with many many layers- one of them being abandoned rail lines. With a few clicks, I suddenly have the accurate route I wanted- along with several other rail lines I didn't know about.

That was $22 USD well spent.
 
Is it that easy ?

So you sucessfully imported a DEM into Trainz and it is up and running in surveyor and driver ?

I have put off trying to learn how to make a DEM as I thought it was higly difficult, and extremely time consuming, and technically intimidating.

Is it really that easy for beginners to create a DEM ?
 
I purchased/downloaded the software this past Sunday and was able to successfully imported the route into surveyor and run the route in driver that same evening. I will not say that it was simple, but all of my questions were answered in the included documentation, and had I bothered to read through them first I would probably have had fewer issues. It's not software you'll pick up and use easily right away, but neither was trainz. The first DEM is hard- all the rest are cake. Here's a quick survey of my process:

1) get the DEM: Since I'm here in the States, I use the National Map Seamless server. Click on the map on the main page and you'll get a viewer page with tools on the left. Under "downloads" you can select a tool that allows you to highlight an area by drawing a rectangle over your area of interest. This brings up a download dialog and here comes my first piece of advice- Select "modify data request" at the top of the download dialog and change the data format to GeoTIFF (it defaults to ArcGrid). This file is directly readable by Transdem. You could export this from Transdem right into Trainz if you wanted- instant ground work!

2) get the raster map overlay: Transdem can work as a web map service client, so it will get the rasters for you. Dr Ziegler includes an XML with the specs on many free mapping service providers- terraserver and topo-somethign for the US. I checked around the internet and found additional ones- I'm sure the state of PA has some. Internet search on Pennsylvania web map service. Anyway- zoom in on part of your DEM where you want a raster map- a topo, or an ortho, or whatever. Bring up the web mapping service dialog, connect with the server you want, and hit get map. Using the web mapping service means you can by-pass the whole geo-referencing bit, which does look like a hassle (this seems to be the process where you have to tell transdem the coordinates of a map you provide- like something you'd scan in)

3) lay out your route. If you are prototyping an existing route- something current- then getting an overlay with the tracks showing should be easy. There's a simple route editor built into Transdem- works a lot like the track tool in Trainz. You could do this step in Trains, but I found it easier to do in Transdem

4) export your dem to trainz. I fell down several times on this step. The instructions were written for trainz 2009 (help files for the trainz portion of transdem are separate from the regular help file, btw)- I was able to get the DEM and the overlay in one step per program- export from transdem and then import the folder in content manager for trainz 2010.

5) export your route. this is an additional step beyond exporting the DEM. You can even select which track kuid you want it to use.

6) open in surveyor. Once you're done using your raster overlay, you'll just paint over it with in-game textures. If you use an ortho, then you can place game buildings directly over satellite image buildings.

here's a quick video of what I've done- I'm spending my time now downloading more raster maps and expanding my dems:

http://www.flickr.com/photos/devandavis/4401149211/

final thought- it takes some effort, but what worthwhile thing doesn't?
 
One other thing- you'll have to scoop out the rivers in surveyor. I think you can edit the DEM in transdem, but I'm familiar with the ground tools in trainz and will just use them I think.
 
Good Work!

:cool: Hello Devan, congrats on your endeavor!

I left off digging rivers & lakes awhile back...I found a HOG texture that closely resembles water.

One thing I do is create a folder to hold all the items downloaded & processed. I name the folder for the route, like "LakelandFL," then so name the DEM, raster maps & route and download all to the same folder. I think the program works faster & easier to export to Trainz. If that is done, usually a mask created with the pointer tool does the trick.

After the DEM is created & raster maps applied, I delete the .zip folder, the opened folder & crop the DEM using the raster maps as a template.

I find more rail-data by using TOPO maps, however there are some places where the Topo map is older than the line, like the Powder River Basin. Map Tile Server does not deliver Topo maps.

I also printed both Help files in color into a notebook, but you seam to be able to use the .pdf files well.

I started using SRTM, but recently I used the link to the GeoTiff maps...the detail is so good(1/3 arc sec), that you can see the dirt ramps to the unloading trestle at the Lakeland, FL MacIntosh power plant, as well as embankments at highway overpasses.

Yes, TransDEM is a Blessing!
 
What I said about the directions being written for trainz 2009 was inaccurate- I should have said that they were written for trainz versions prior to 2010.
 
I'm unable to get TranDEM to work. I have created the route, raster maps, and followed the tutorial and receive the same error [Errors Writing File].

My route is approx 37 kms long. If anyone can assist me in getting a DEM of the Sunbury Line in Melbourne created, please let me know.
 
We'll try...

:cool: What version of Trainz are you using?

The proceedure for TRS2004 is different than '06, but '06 routes will export to o'9.

It's UTM tiles that gave a problem in '06.
 
which program is giving the error- transdem as it exports or trainz as it imports? Or is it during some other procedure?
 
cascaderailroad: I threw this dem together in a couple of minutes- the hard part was actually locating the horseshoe curve on the dem

4407742224_f6917ba1d2_b.jpg


I can't comment on how precise these environments, but I've been very happy with the accuracy of the areas I've been modeling.

If I were smarter, I'd upload this route to the dls so that you could review it closer...
 
G'day devandavis,

You wrote...

..."...One other thing- you'll have to scoop out the rivers in surveyor..."...

...which is minimised if you download the NED 1/3 arcsec DEMs from Terraserver. These will give you DEMs with a resolution of 10 meters - perfectly suitable for the 10 meter grid in Trainz. Each 'point' of "geodata" matches a point on the grid - there is no 'interpolation' required. For example, here are three images of the Little River in the vicinity of Spruce Creek on the PRR line that runs south east from Tyrone (towards Barry, if my memory serves me correctly). This first one with 90 meter (3 arcsec) DEM from SRTM...

Pennsylvania18.jpg


...this next one with 30 meter (1 arcsec) DEMs...

Pennsylvania19.jpg


...and finally using the 10 meter (1/3 arcsec) from NED...

Pennsylvania20.jpg


...(which I used to create the route that cascaderailroad is currently working on as his 'life's work'). I rest my case. The only 'issue' that might arise is the commensurate increase in the amount of data that TransDEM must manipulate - each 'increase' in resolution means a threefold increase in the amount of data involved. For those who might be interested, the cyan lines entering the images from the lower right show the location of the two lines at this location, with their apparent 'ceasure' marking the location of the eastern portals of the Spruce Creek Tunnels.

It would be "very nice" if we had this degree of resolution available for the rest of the world (free of charge), too (do you think there's any chance we could 'convince' the American government to 'pay' each and every other government to allow them to do this?).


By the way, devandavis, you do realise that those of us who know how to do this, are supposed to keep it's simplicity 'a secret' from those who don't . If everyone could (as they should) be able, to use TransDEM, there'd be nothing for us to do...

Jerker {:)}
 
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hi ... i was just wondering if there was a trial version of tranzdem as i would like to try b4 buy ... lol

I don't know if the author has any kind of trail version.

I bought Tranzdem about a year ago and never once regretted it. Just buy it, it is fairly cheap and well worth the purchase.
 
Prometheus- I just got the same error when I tried to export a map. I fixed it by using the pointer tool and drawing a rectangle around the area I wanted to export- essentially the entire map.
 
G'day Prometheus_au,

From your posts, I presume you are trying to create a route to cover the 40 odd Kilometres of railway line from Southern Cross to Sunbury. There is no reason for TransDEM to baulk at this unless you are trying to export the entire are of the 108 x 108 Kilometre DEM required for the area (S38E144). The 'error' is usually a consequence of TransDEM running out of memory. Are you exporting the route with a route vector filter (the railway line 'traced' using the "Simple Route Editor" that is built into TransDEM)? Have you updated to Version 2.0 (or using it anyway) and modified your "boot.ini" according to the instructions to fully utilise the maximum memory capacity of your machine?

I will quickly take a look at the route for you to see if I have any issues...

...hang in there...

Jerker {:)}
 
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G'day prometheus_au,

I have just created a route based on the above premise (Southern Cross/Spencer Street to Sunbury) using the SRTM 3 arcsec (90 meter) DEM data with Topographic maps supplied by the UBD Melbourne Street Directory and exported from TransDEM in TS2009 format (with the 5 meter grid activated over the entire area of the layout), that exported perfectly without any incident and it even imported directly (using the "Import Content" function in CMP+) into TS 2010, all without any problems whatsoever!!!!!

If you are unable to produce satisfactory results of your own after all our efforts here to assist you, you are most welcome to a copy of this route...

Jerker {:)}
 
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