Greyscale elevation calculator

[moganite 4]

 This is the tool i developed for the calculation of  elevations as i will be doing alot of maps at various elevations i think it will be useful. Once you have downloaded your Height data and determined the region you use you find the lowst and highest points or near as possible. your lowest point determines the  lowest land which is your starting point  grey 37 for the 1500 m relief plugin. to determine the relief plugin you use you subtract the lowest elevation from the highest to get a number select the closest number up that will be the plugin to be used. The spreadsheet contains  12 sheets for; 100, 250, 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000 m these are the plugins that Mallow uses and are the plugins from which the data was derived so he should at least get credit as part of this also. to get the greyscale you change the first number in the collum G which has the title elevation above sea level it is highlighted in red. the spread sheet will then calculate the  rest of the greys and a small table of greys that can either be exported or input maunally into a program such as global mapper or any program that represents height maps graphically. Hope this explains how to use it. There also may be some improvements thatcan be made regarding presentation. Also if someone has annother height or relief plugin it can calculate that using and sheet and changing the top of the central Greyscale/elevation table inputs the grey for sealevel/lowestland and the step height to the step value of the terrain. the prces for depth of rivers/lakes/oceans is the same. but i kep it seperate. Hope these instructions are easy to follow it is a prototype at this stage and probably need some polishing to make it easier to use. will welcome any suggestions to make it easier to use.

[MallowTheCloud 41]

Awesome! There were a couple minor errors in numbers, but I fixed those. When I did, I noticed something very interesting. Most of the greyscale '0's were near -250m. I looked at the plugins in iLive again, and sure enough the water depth is set to a default of 250m. More importantly, this one piece of information allowed me to remake all my plugins to be PRECISE. Instead of a max elevation of 1491 meters above sea level, the 1500m plugin now has a max elevation of 1500 meters above sea level, as advertised. I also changed the spreadsheet to account for these new numbers, and have attached it to this post. Thanks a million, moganite!

[moganite 4]

Thanks for correcting those flaws Mallow  it is so much easier to see errors when they are tabulated or in a graph How was the spread sheet to use? If you change the red number in ythe elevation colum  you can set your lowest land to correspond to your lowest land in your heightmaps.Alos if we can find baythemetric datah there is no reason we can't scale that too.<img src="/forum/i/expressions/37.gif" alt="" />

[MallowTheCloud 41]

The spreadsheet was VERY easy to use in my opinion. I think it was a great idea. Thanks again!

[MallowTheCloud 41]

I have created an executable program similar to yours that can serve many purposes. Though it isn't quite as extensive as your spreadsheet, it is made for ease of use.

Please download and try it.

[JustinHayward 10]

Superb piece of team work guys - excellent work to both Moganite and Mallow !!!

Now this is what I call a map making team !!!

[moganite 4]

A few things i would consider

I would include  sea level and possibly write the list to a data file and if niether program works then the spread sheet. Just had a look at the program it is very  easy to use.

I would also propose that a data file be a coma separtaed file in text. Say heightscale/region name.

if you enable the user to enter the lowest land elevation so that you can set  the grey near sea level to that elevation. Another option would be  lowest land elevation versus sea level .

At this stage i think we need a few more tests to identify/squish some bugs

 You  will get there

hope these ideas help