Re: Agawa Canyon Expedition - map help please -- Fortune Bay Expeditionary Team Campfire

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Subject: Re: Agawa Canyon Expedition - map help please

Author:
Ken

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Date Posted: 16:34:18 08/19/04 Thu
In reply to: pathfinder 's message, "Re: Agawa Canyon Expedition - map help please" on 10:45:36 08/19/04 Thu

We're talking at slightly different angles here Pathfinder. The calibration of the map image is used by the GIS software to figure out where to put things like the GPS data. To calibrate properly you do, as you say, need to know the projection of the map and such like. GeoTIFF files have this info stored directly in the file. I can't just cut and paste a DRG into a mapping program and then have it instantly work. That is where the calibration comes in. Perhaps we're using different terms to talk about the same thing. That wouldn't surprise me.

So as for what projection. I don't right now really care. a UTM grid projection (traverse mercator) of the area is fine - let's see that was UTM zone 16T which has standard longitude of -87° and standard latitude of +44°.) Map datum should be WGS84 since that's wht my GPS data is in.

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Replies:

Subject	Author	Date
Re: Agawa Canyon Expedition - map help please	Pathfinder	12:03:23 08/23/04 Mon