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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | Re: GISList: GPS data collection spawns court case! |
| Date: |
03/07/2002 06:05:18 PM |
| From: |
Robert Heitzman |
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>An interesting post on another list poses the question, should GIS people
>be conducting land surveys?
Makes no difference what tool you use, it depends on what the requirements
are for the data and its quality. Certainly lowly GIS people should not do
"land surveys".
In the case of a hydrant inventory what's the legal requirement? If the
surveyor can lobby with the city to get a clause put into a contract, or
city standards, requiring his profession's services, that's fine. Not with
me, but with the lawyers.
A similar situation came up in the collection of TIGER street data.
Certainly GPS and aerial photo techniques are plenty accurate in themselves
to do the job within accuracy specifications. What was lacking was the
quality. The last round of TIGER data gathering was pitiful in some cases
because of unprofessional work. In the future rounds the TIGER folks will
have some clause in their contract that the data quality be to a certain
standard. This may very well require the services of a professional
surveyor. (And probably cost the taxpayer's a pretty penny since they will
probably go to full cadestral quality - watch for grumbling about charging
for TIGER in the future.)
But the TIGER case is a contract issue. It doesn't mean that every person
taking a street centerline has to be a surveyor. It only says if you what
to work a contract for TIGER you have to meet the contract.
Same applies to the hydrant data. If the consumer of the data is OK with
its accuracy and quality so be it. Now if they go to sell that hydrant (or
something more sellable - Brooklyn Bridge maybe) there are laws that would
rule out the hydrant survey data and require a true land survey.
Lawyer's, what ya gonna do! Only thing worse is a gullible politician that
pass stupid laws to keep the lawyer's in business. Outlaw GPS units now!!!
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