Mars Altimetery Graph // ver B // Monday Banner

Mars Altimetery Graph ver B
run the sketch—view the code—download

How do you use it?
Primarily just watch and enjoy. A mouse click toggles the drawing of the green lines. (This looks best if you let it run for a while so I recommend downloading and running it in Processing locally.)

What is it?
This is a functioning version of Friday’s post. I thought it might help me figure out the MEGDR Viewer if I looked at the same data in a different way, so I enlisted the techniques from the Line Graph sketch. It now creates an overlapping area graph of Mars altimetry data*. I switched to continuous mode (i.e. using setup() and draw()), and had to load the data into a string instead of a byte array. I could only get the byte array to work if it was instantiated inside of draw(). Loading a 2MB file in each cycle of the draw loop made it unbearably slow.

*Citation:
Smith, D., G. Neumann, R. E. Arvidson, E. A. Guinness,
and S. Slavney, “Mars Global Surveyor Laser Altimeter Mission
Experiment Gridded Data Record”, NASA Planetary Data System,
MGS-M-MOLA-5-MEGDR-L3-V1.0, 2003.

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