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Hawaii Relief Map

by pmoews, published

Hawaii Relief Map by pmoews Jun 18, 2013

Featured Thing!

Description

Here is a relief map of Hawaii, the Big Island.

It is based on a NOAA digital elevation model or DEM - hawaii_6s_20070806.asc.

See - ngdc.noaa.gov/dem/squareCellGrid/download/460

The data set consists of an array of real numbers with 3000 rows and 4200 columns. The distance between points is 6 arc seconds. A 200 by 200 array, sampled at 30 arc second intervals and surrounding Hawaii, was used to make the stl file. Points below sea level were set to the sea level value.

In the model the highest peak rises about 20 mm above sea level. The highest peak on Hawaii, Mauna Kea, is 4200 meters above sea level.

NOAA has a portal that helps one find many similar data sets. See ngdc.noaa.gov/mgg/dem/demportal.html

Recent Comments

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oh man makes me miss living in Kona
How do I use the fortran file with Meshlab? I've used meshlab and numerous other programs for some time but do not know how to utilize the file to output an STL.
do you see the sheep's head? That's all I can see now. Baahh.

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Instructions

The file should be printed directly on the build platform. I used three shells to insure smooth tops to the peaks.

A fortran program was used to treat the data file. Rather than output an stl file the program writes an openSCAD polyhedron command. This allows the use of openSCAD's thrown together command for debugging. The simple ascii data file made this a nice exercise.
oh man makes me miss living in Kona
How do I use the fortran file with Meshlab? I've used meshlab and numerous other programs for some time but do not know how to utilize the file to output an STL.
do you see the sheep's head? That's all I can see now. Baahh.
I have replaced the source code with a new version, Hawaii_maps_v2.f
Hey, pmeows, congrats on the Featured status. I had a little fun adding your photo into Ponga so that I could highlight hot spots (highly relevant on an island full of volcanos.) See: ponga.com/feee9e66754da8f2#/
Do you have source for the fortran program?
Aloha... I printed this today however... the island needs to be rotated 90 degrees clockwise in relation to the "Hawaii" text at the top - so that is oriented North.

As it is now, it doesn't look like the Big Island unless you rotate it.
hi what resolution was this printed at

i love the topo contour effect you got.
Wow! Other Big Island buddies!
T'anks! I'm going to print one today
Although, the island does need to be rotated 90degrees clockwise.
Thanks Brah! U da man!

Shootz!
added hawaii_caption_north.stl
thank you so much for posting this! I live in Hawaii and wanted to print our island for a long time! it would be nice if the island was oriented with the north facing the caption. right now the island appears upside down.

Mahalo!
I was reluctant to supply the fortran as I wrote it without comments and it requires inline changes.
However I have added comments and have uploaded it - hawaii_map.f -
The code is very simple but your students will need
some understanding of stl files and openSCAD.
Please provide more detail on program too chain to convert NOAA data to STL. Please. Would like to try other areas for K12 science program.
I too would love to see the fortran you used for this. I'd love to print some topography and bathymetry for Norwegian fjords.
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