Maintaining Accurate GIS Data

Blog_MaintainingAccurateGISData.pngIt is safe ​to say that many organizations do not use maps as part of
the day-to-day operations simply because their nature of business does
not require them to do so. For those organizations that do require maps
however, the accuracy of the data displayed on these maps becomes a
high priority. For what good would a map be if the information that is
on it is wrong?

For local government entities, the amount of changes that happen
daily makes the need for data updates all the more important. If a
water line was recently installed, it won’t be long before an Engineer
needs to see that information in conjunction with the existing water
lines in order to help facilitate their future planning process. If a
building is demolished, a Planner might not have a good base map to use
because the data on the map is old. Often times these updates go
unnoticed unless someone notifies the mapping department that a change
has occurred.

For the Village of Morton Grove, IL, it is the job of Geographical
Information Systems (GIS) Mapping Department to keep these changes
current for in-house mapping needs and data analysis. The GIS
Department continually converses with multiple departments in the
Village in order to track down changes as well as takes advantage of a
sharing agreement with the county to update parcel information. One of
the more interesting methods for updating data has included the use of
free aerial photography resources from the internet to overlay on a
current map so that new buildings, sidewalks driveways, etc. can be
drawn in to their newly designed shape.

Overall, it is not easy to keep up with everything that changes in
the real world but having a good centralized repository such as a GIS
and fairly decent resources can help from letting your maps become
obsolete.

Maintaining Accurate GIS Data

Blog_MaintainingAccurateGISData.pngIt is safe ​to say that many organizations do not use maps as part of
the day-to-day operations simply because their nature of business does
not require them to do so. For those organizations that do require maps
however, the accuracy of the data displayed on these maps becomes a
high priority. For what good would a map be if the information that is
on it is wrong?

For local government entities, the amount of changes that happen
daily makes the need for data updates all the more important. If a
water line was recently installed, it won’t be long before an Engineer
needs to see that information in conjunction with the existing water
lines in order to help facilitate their future planning process. If a
building is demolished, a Planner might not have a good base map to use
because the data on the map is old. Often times these updates go
unnoticed unless someone notifies the mapping department that a change
has occurred.

For the Village of Morton Grove, IL, it is the job of Geographical
Information Systems (GIS) Mapping Department to keep these changes
current for in-house mapping needs and data analysis. The GIS
Department continually converses with multiple departments in the
Village in order to track down changes as well as takes advantage of a
sharing agreement with the county to update parcel information. One of
the more interesting methods for updating data has included the use of
free aerial photography resources from the internet to overlay on a
current map so that new buildings, sidewalks driveways, etc. can be
drawn in to their newly designed shape.

Overall, it is not easy to keep up with everything that changes in
the real world but having a good centralized repository such as a GIS
and fairly decent resources can help from letting your maps become
obsolete.