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TEMPLOT is Martin's hobby project. Everyone is welcome to use it and join in the ongoing developments. Thanks for visiting Templot Club.
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TEMPLOT 3D PLUG TRACK - To get up to speed with this experimental project click here. To watch an introductory video click here. See the User Guide at Bexhill West.
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The Plug Track functions are experimental and still being developed. Some of the earlier pages of this topic are now out-of-date.
For an updated overview of this project see this topic. For some practical modelling aspects of using Plug Track see Building 3D Track.
The assumption is that you have your own machines on which to experiment, or helpful friends with machines. Please do not send Templot files to commercial laser cutting or 3D printing firms while this project is still experimental, because the results are unpredictable and possibly wasteful.
Some pages of this and other topics include contributions from members who are creating and posting their own CAD designs for 3D printing and laser-cutting. Do not confuse them with Templot's own exported CAD files. All files derived from Templot are © Martin Wynne. -
The Plug Track functions are experimental and still being developed.
For an updated overview of this project see this topic. For some practical modelling aspects of using Plug Track see Building 3D Track.
The assumption is that you have your own machines on which to experiment, or helpful friends with machines. Please do not send Templot files to commercial laser cutting or 3D printing firms while this project is still experimental, because the results are unpredictable and possibly wasteful.
Some pages of this and other topics include contributions from members who are creating and posting their own CAD designs for 3D printing and laser-cutting. Do not confuse them with Templot's own exported CAD files. All files derived from Templot are © Martin Wynne.
Map scaling issue
- Thread starter hibberni
- Start date
Quick reply >
Hi Nick,
Welcome to Templot Club.
Knowing the scale is 50ft/inch isn't much help unless you have the paper original to measure. Alternatively if you know the DPI resolution at which it was scanned( e.g. 200, 300, 600, etc.) it would be possible to do some scaling calculations.
However, the best way of scaling a scanned map is to assume you know nothing about it and measure something you do know.
For example, here on the NLS web site I used the measuring tool on the historic 25-inch map of Spalding to measure the distance from the south-west corner of the goods shed to the north-east corner of the signal box:
The NLS says it is 712ft. So that's 712 x 4 = 2848mm in 4mm/ft scale.
Now in Templot, set the spacing ring to that radius -- i.e. the ring diameter is 2848 x 2 = 5696mm:
And for convenience move the ring to the grid origin:
Now load your scan as a picture shape, and lock the scaling of picture shapes to the spacing ring:
Also set this option:
Now you can shift your picture until the corner of the signal box is under the grid origin, and then size (scale) it by mouse action until the corner of the goods shed is under the spacing ring (inner ring):
You can zoom in close while you do this for accuracy.
It will then be scaled at 4mm/ft. All quite easy to do.
• Do not click the options to move the ends/corners because this will distort the aspect ratio and there is no easy undo function.
p.s. 37297 x 8094 pixels is a very large image. You will need a well-specified computer system to handle it, and Templot may respond very slowly while it does it. It might be better to use a graphics/photo editor program to split it into smaller sections which can be loaded as separate picture shapes.
I hope the above is enough for you to follow. If not, and you are a Templot beginner, I strongly recommend that you don't try to align tracks over a scanned map until you have learned the basics of Templot first. Diving straight into your intended layout project is not a good way to learn Templot. I keep saying this, but no-one ever takes any notice.
cheers,
Martin.
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message ref: 7497
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message ref: 7500
Martin Wynne
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@hibberni
Hi Nick,
Welcome to Templot Club.
Knowing the scale is 50ft/inch isn't much help unless you have the paper original to measure. Alternatively if you know the DPI resolution at which it was scanned( e.g. 200, 300, 600, etc.) it would be possible to do some scaling calculations.
However, the best way of scaling a scanned map is to assume you know nothing about it and measure something you do know.
For example, here on the NLS web site I used the measuring tool on the historic 25-inch map of Spalding to measure the distance from the south-west corner of the goods shed to the north-east corner of the signal box:
The NLS says it is 712ft. So that's 712 x 4 = 2848mm in 4mm/ft scale.
Now in Templot, set the spacing ring to that radius -- i.e. the ring diameter is 2848 x 2 = 5696mm:
And for convenience move the ring to the grid origin:
Now load your scan as a picture shape, and lock the scaling of picture shapes to the spacing ring:
Also set this option:
Now you can shift your picture until the corner of the signal box is under the grid origin, and then size (scale) it by mouse action until the corner of the goods shed is under the spacing ring (inner ring):
You can zoom in close while you do this for accuracy.
It will then be scaled at 4mm/ft. All quite easy to do.
• Do not click the options to move the ends/corners because this will distort the aspect ratio and there is no easy undo function.
p.s. 37297 x 8094 pixels is a very large image. You will need a well-specified computer system to handle it, and Templot may respond very slowly while it does it. It might be better to use a graphics/photo editor program to split it into smaller sections which can be loaded as separate picture shapes.
I hope the above is enough for you to follow. If not, and you are a Templot beginner, I strongly recommend that you don't try to align tracks over a scanned map until you have learned the basics of Templot first. Diving straight into your intended layout project is not a good way to learn Templot. I keep saying this, but no-one ever takes any notice.
cheers,
Martin.
message ref: 7497
Bonjour Martin,
Many thanks for your prompt & detailed reply.
I’m running a refurbished Mac Pro coupled to a widescreen (32¨) monitor. Templot is sitting in Parallels Desktop and there does not appear to be a problem with the size of the plan and Templot is coping ok.
I have also saved a copy of the plan to ‘GIMP’ where, again, there is no problem with the size.
As, I’m sure you have surmised, I’m new to Templot and promise to follow your advice re track alignment.
The plan was purchased from here…
https://nr.printstoreonline.com/
to supplement those pics and drawings etc which I have found (over a period of many months) on the net. I discovered Templot from…
https://www.youtube.com/@BexhillWest/featured
Cordialement
Nick.
Many thanks for your prompt & detailed reply.
I’m running a refurbished Mac Pro coupled to a widescreen (32¨) monitor. Templot is sitting in Parallels Desktop and there does not appear to be a problem with the size of the plan and Templot is coping ok.
I have also saved a copy of the plan to ‘GIMP’ where, again, there is no problem with the size.
As, I’m sure you have surmised, I’m new to Templot and promise to follow your advice re track alignment.
The plan was purchased from here…
https://nr.printstoreonline.com/
to supplement those pics and drawings etc which I have found (over a period of many months) on the net. I discovered Templot from…
https://www.youtube.com/@BexhillWest/featured
Cordialement
Nick.
message ref: 7500
