Reply to "Elevations from various sources"

peteriegelRCMBB Founder

By "USGS Map" I mean old paper maps with benchmarks printed here and there, with noted elevations. This is closer than interpolating between contour lines.

Not putting the cursor in the exact same spot can cause error too, but when a tiny wiggle of the cursor produces a jump in elevation, there's a small program error at work.

Although the aerial photos show what's on the ground, house roofs don't seem to make the elevation change.

I'm sure that some mathematical interpolation is used to calculate an elevation from two or more surrounding data points, but I have no clue how it's done.

I'll be looking forward to seeing your results.

Have you located Pike's Peak yet?

8/12/1111:17 AM

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