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| GeoCommunity Mailing List |
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| Subject: | RE: GISList: GPS data collection spawns court case! |
| Date: |
03/07/2002 08:31:21 PM |
| From: |
Anthony Quartararo |
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Robert,
This example really does point to how pointless the argument is to have
surveyors as "acceptable" GPS data collectors. The implications in your
statement that a surveyor would not create or cause errors is not based in
reality. This issue of data quality is not at all related to whether a
"lowly GIS person" did it or a licensed land surveyor did it. It is about a
failure to vet a contractor and exercise contract language to ensure
deliverables meet the specification. If the product was unacceptable, then
it should have been reworked, whether the contractor used a surveyor or not.
Surveying is useful, in a legal situation, such as property ownership,
taxing authorities, jurisdiction, etc. It is also a necessary evil: and
what I mean by that is how many times have you and I seen a survey crew on
the same stretch of road over time. Engineering firms are not going to
trust previous surveys, even if it was done with their own people. Why?
Because the litigation potential for NOT surveying is simply too high. It's
CYA, no matter how you slice it, but it's not necessary in all circumstances
where the Government is collecting spatial data about infrastructure it
owns. It's a very slippery slope to state that this type of data collection
is only reliable and trustworthy if done by a licensed surveyor. What's
next, are surveyor's going to be required to place mailbox posts in the ROW
that is owned by the municipality.
Anthony
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.)
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