On 11/05/2012 00:44, b...@lysator.liu.se wrote:
Hi Tim,
The answer is NO. Even though decent accuracy can be had with long
averaging. It was discussed a few years ago on this list.
--
Björn
Hi all,
Hope this isn't too chat roomy, however, I have need of a survey precise
geolocation type
Go to your local building and planning commission, and get yourself
a copy of the topographical map for your address. They are cheap, and
are the standard by which everyone (insurance, zoning, ...) determines
your flood plane exposure.
-Chuck Harris
...
Well that's disappointing!
I need to
On 5/11/12 5:23 AM, swingbyte wrote:
s disappointing!
I need to measure the height of my house floor to be above the flood
plane contour. I might have a look at some dted from work. Might have to
pay a real surveyor to measure the height datum.
Thanks for all the info though guys
for that,
On 5/11/12 5:54 AM, Chuck Harris wrote:
Go to your local building and planning commission, and get yourself
a copy of the topographical map for your address. They are cheap, and
are the standard by which everyone (insurance, zoning, ...) determines
your flood plane exposure.
I have been
The FEMA maps didn't exist the last time I did this. I would think
it likely that the building and planning commission office for his
area would have the appropriate maps, as establishing that the proposed
house's location is outside of the the 100 year flood plane, is a
necessary check mark in
On 5/11/2012 6:46 AM, Jim Lux wrote:
On 5/11/12 5:23 AM, swingbyte wrote:
s disappointing!
I need to measure the height of my house floor to be above the flood
plane contour. I might have a look at some dted from work. Might have to
pay a real surveyor to measure the height datum.
Thanks for
How accurate do you need your height?
Remember that height is the least accurate of GPS parameters due to the fact
that you rarely have a GPS satellite directly overhead.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of
On 05/10/2012 02:50 PM, swingbyte wrote:
Hi all,
Hope this isn't too chat roomy, however, I have need of a survey precise
geolocation type gps. I was wondering if the precise timing abilities
extend to its precision in position output? I have a thunderbolt and one
of those conical white aerials
Not being able to receive signals from GPS satellites anywhere below
the horizon is an even larger problem for vertical accuracy.
On Thu, 10 May 2012 13:59:51 +0100, Rob Kimberley
robkimber...@btinternet.com wrote:
How accurate do you need your height?
Remember that height is the least
On Thu, 10 May 2012 22:50:15 +1000
swingbyte swingb...@exemail.com.au wrote:
Hope this isn't too chat roomy, however, I have need of a survey precise
geolocation type gps. I was wondering if the precise timing abilities
extend to its precision in position output? I have a thunderbolt and
On 5/10/12 6:08 AM, Magnus Danielson wrote:
On 05/10/2012 02:50 PM, swingbyte wrote:
Hi all,
Hope this isn't too chat roomy, however, I have need of a survey precise
geolocation type gps. I was wondering if the precise timing abilities
extend to its precision in position output? I have a
A man with only one GPS
Surveys from different receivers I have. All taken at the same
height from prolonged surveys. WGS84 datum.
Oncore UT+ A 207,62m
Oncore UT+ B 209,24m
Z3801A 180,72m
Oncore VP A 229,95m
TBolt 207.00m
Le 10/05/2012
On 5/10/12 6:42 AM, mike cook wrote:
A man with only one GPS
Surveys from different receivers I have. All taken at the same height
from prolonged surveys. WGS84 datum.
Oncore UT+ A 207,62m
Oncore UT+ B 209,24m
Z3801A 180,72m
Oncore VP A 229,95m
TBolt 207.00m
That's a pretty big
Le 10/05/2012 15:51, Jim Lux a écrit :
On 5/10/12 6:42 AM, mike cook wrote:
A man with only one GPS
Surveys from different receivers I have. All taken at the same height
from prolonged surveys. WGS84 datum.
Oncore UT+ A 207,62m
Oncore UT+ B 209,24m
Z3801A 180,72m
Oncore VP A 229,95m
Hi Tim,
The answer is NO. Even though decent accuracy can be had with long
averaging. It was discussed a few years ago on this list.
--
Björn
Hi all,
Hope this isn't too chat roomy, however, I have need of a survey precise
geolocation type gps. I was wondering if the precise timing
Not for survey type accuracy (sub-meter, short measurement time).
The average (over a 48 hour period) was pretty good (about 1.5 meters,
RMS), but the reading over any 1 minute period can be off as much as 3-5
meters, satellite geometry dependent.
I Have two units with good antennas, mounted
Attilla,
On Thu, 10 May 2012 22:50:15 +1000
swingbyte swingb...@exemail.com.au wrote:
Hope this isn't too chat roomy, however, I have need of a survey precise
geolocation type gps. I was wondering if the precise timing abilities
extend to its precision in position output? I have a
There is an error in your quoted text. The author must have though
there was a difference between WGS84 and true sea level. No that
is not true. If you paper map that you bought from US Gological
Survey says WGS84 on it then THAT is the definition of sea level on
that map. The altitudes of
On Thu, 10 May 2012 17:01:48 +0200
b...@lysator.liu.se wrote:
On Thu, 10 May 2012 22:50:15 +1000
swingbyte swingb...@exemail.com.au wrote:
Hope this isn't too chat roomy, however, I have need of a survey precise
geolocation type gps. I was wondering if the precise timing abilities
On Thu, May 10, 2012 at 10:23 AM, Arthur Dent golgarfrinc...@yahoo.com wrote:
Chris Albertson albertson.chris at gmail.com
I'm not sure what point you're trying to make but it is a fact, as the OP
pointed
out, that there are differences between the empirical data of 'true
elevation' and
On 5/10/12 7:40 AM, Arthur Dent wrote:
I've found significant altitude errors using a GPS and the following quotes
found on the internet will explain why. From my experience of hiking
in the mountains of New Hampshire an aneroid altimeter will vary with
atmospheric pressure about 200 feet for a
On 5/10/12 10:46 AM, Chris Albertson wrote:
mean sea level is not meaningful any more. What shape is the ocean
and what if you live in Kanas? How to extrapolate the ocean level to
Kanas? The answer is to use a model of some kind
mean sea level, these days, is a name for a particular
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