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  • interpreting valuation map data?

  • Discussion related to everything about model railroading, from layout design and planning, to reviews of related model tools and equipment. Discussion includes O, S, HO, N and Z, as well as narrow gauge topics. Also includes discussion of traditional "toy train" and "collector" topics such as Lionel, American Flyer, Marx, and others. Also includes discussion of outdoor garden railways and live steamers.
Discussion related to everything about model railroading, from layout design and planning, to reviews of related model tools and equipment. Discussion includes O, S, HO, N and Z, as well as narrow gauge topics. Also includes discussion of traditional "toy train" and "collector" topics such as Lionel, American Flyer, Marx, and others. Also includes discussion of outdoor garden railways and live steamers.

Moderators: 3rdrail, stilson4283, Otto Vondrak

 #1419456  by MSD
 
I'm trying to understand the unit of measure for vertical alignment (elevation) dimensions found on valuation maps to aide in a possible model layout. For example, a map has two of the stations labeled as 394 & 395, and at station 394 it has 0.19 in the vertical alignment slot and station 395 has 0.57 for the vertical alignment. The Vertical Alignment - Max Elevation for the branch is 683.00 and the Minimum Elevation for the branch is 633.0. So, what is the height of stations 394 & 395 in like feet?
 #1420673  by TrainDetainer
 
Are you sure the 394 and 395 are stations, not mile posts? Without seeing the print I can't say, but if they're mile posts the vertical values are probably percent of delta total - in your case 683 - 633 = 50' total, so elevation at 394 would be 633' + (50' x .19) = 642.5' and 395 would be 633' +(50' x .57) = 661.5', so you're gaining 19' in a mile or .36% grade. If they really are 100' stations, there should be elevation/topo markers that would likely make the 'slot' numbers additives following a whole marker, like 635' + (12" x .19) = 635' 2.28" and 635' + (12" x .57) = 635' 6.84", so you're gaining 4.56" in 100' or .38% grade.
 #1420724  by MSD
 
Your right; they are mile posts not stations. These valuations maps are rather confusing at times. Thank you for detailed explanations on how these things are calculated.