Another tempting place to drag the family! Thanks. About the elevation controversy. I'd trust GPS less than any surveyor , except Mark Twain (See "A Tramp Abroad"). I once tested the Skagit County Sheriff's early-model Magellan in fron of the courthouse, and it told me I was 300 feet below sealevel. Wish I'd known that sooner; I'd have held my breath.
Since Clinton ordered Selective Availability turned off in May 2000, GPS is now actually very useable, especially if you have WAAS enabled. Elevations with GPS will not necessarily match maps (for a reason that takes too long to explain here) but positions are typically within 15 to 30 feet of true - about the width of a line on a quad sheet.
I regularly do mapping projects with both recreational and mapping grade receivers and am continually impressed with the realtive accuracy of the recreational models.
Thanks for the vote, Eric. Funny thing, Dean was up there last weekend (3/12) and reported that his GPS read less that 2400 feet as did mine. I'm suspicious that the original survey was in error. Would like to see more data, but it looks like a trend is starting.
Don Nelsen - Feb 23, 2005 9:11 pm - Hasn't voted
Untitled CommentDefinitely basalt, and pretty crumbly, too. Looks about the same as the stuff on most of the rest of the Gorge peaks. Thanks for the vote, too!
don
BCL - Feb 23, 2005 7:12 pm - Voted 10/10
Untitled CommentNice!
Don Nelsen - Mar 13, 2005 10:49 pm - Hasn't voted
Untitled CommentThanks for the vote and the compliment.
dn
Eric Sandbo - Feb 23, 2005 7:37 pm - Voted 10/10
Untitled CommentAnother tempting place to drag the family! Thanks. About the elevation controversy. I'd trust GPS less than any surveyor , except Mark Twain (See "A Tramp Abroad"). I once tested the Skagit County Sheriff's early-model Magellan in fron of the courthouse, and it told me I was 300 feet below sealevel. Wish I'd known that sooner; I'd have held my breath.
Moni - Feb 25, 2005 9:30 am - Voted 10/10
Untitled CommentSince Clinton ordered Selective Availability turned off in May 2000, GPS is now actually very useable, especially if you have WAAS enabled. Elevations with GPS will not necessarily match maps (for a reason that takes too long to explain here) but positions are typically within 15 to 30 feet of true - about the width of a line on a quad sheet.
I regularly do mapping projects with both recreational and mapping grade receivers and am continually impressed with the realtive accuracy of the recreational models.
Don Nelsen - Mar 13, 2005 11:01 pm - Hasn't voted
Untitled CommentThanks for the vote, Eric. Funny thing, Dean was up there last weekend (3/12) and reported that his GPS read less that 2400 feet as did mine. I'm suspicious that the original survey was in error. Would like to see more data, but it looks like a trend is starting.
dn
Saintgrizzly - Feb 24, 2005 2:39 am - Voted 10/10
Untitled CommentNice, Don. You put up good pages!
Don Nelsen - Mar 13, 2005 10:52 pm - Hasn't voted
Untitled CommentThanks Vernon, but its the mountains that deserve the credit! I feel so lucky to live in such a great place.
Are you having the same incredible weather we have been getting? Looks like June out there!
don
wildstar - Feb 24, 2005 10:33 pm - Voted 10/10
Untitled CommentNice page Don.
Don Nelsen - Mar 13, 2005 10:54 pm - Hasn't voted
Untitled CommentThanks for the vote and the compliment.
dn
Moni - Feb 25, 2005 9:31 am - Voted 10/10
Untitled CommentNice job!
Don Nelsen - Mar 13, 2005 10:49 pm - Hasn't voted
Untitled CommentThanks for the vote!
dn
Don Nelsen - Mar 13, 2005 10:53 pm - Hasn't voted
Untitled CommentThanks for the vote and the compliment.
dn
Don Nelsen - Mar 13, 2005 10:57 pm - Hasn't voted
Untitled CommentThanks for the vote!
dn