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Utah Parcels Rick Kelson AGRC [email_address]
AGRC now has parcel data from all 29 counties ! <ul><li>Some counties submit the entire countywide parcel dataset while ot...
Parcel Accuracy <ul><li>Counties maintain their parcel datasets differently: </li></ul><ul><ul><li>From COGO description <...
Parcel Attributes <ul><li>These are the only seven attributes we distribute with the parcel data </li></ul><ul><li>Using P...
<ul><li>Private Land Ownership </li></ul><ul><li>BLM Land </li></ul><ul><li>State Trust Lands </li></ul><ul><li>National F...
Parcel Attributes The OWN_TYPE field is populated using a ‘spatial join’ with the SGID Land Ownership’s very generalized O...
Utah Parcel Viewer and Download Application
Utah Parcel Viewer and Download Application
Utah Parcel Viewer and Download Application
Utah Parcel Viewer and Download Application
Utah Parcel Viewer and Download Application
Custom County Parcel Viewer Application <!-- CUSTOM PARCEL VIEWER, specify county id and size --> <div id='agrcParcelViewe...
Custom County Parcel Viewer Application
Custom County Parcel Viewer Application
Custom County Parcel Viewer Application
Custom County Parcel Viewer Application
Address Points Derived From Parcels <ul><li>Recently there has been a large push to create a statewide database of address...
Address Points Derived From Parcels <ul><li>Converting parcels to address points presents several hurdles: </li></ul><ul><...
Address Points Derived From Parcels <ul><li>Bert Granberg from the AGRC has developed some VBA code that attempts to conve...
Address Points Derived From Parcels Raw parcels
Address Points Derived From Parcels Address Polygons (shown in red, gray lines indicate parcel boundaries that were remove...
Address Points Derived From Parcels Address Points (frontage style)
Questions ? Rick Kelson AGRC [email_address]
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Utah SGID: Parcel Layer Activities Update (UGIC 2011)

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Rick Kelson's slides describing the efforts to compile a statewide parcel GIS data layer in Utah. A subset of the broader Building the Utah Cadastre Through Partnerships presentation given by AGRC's cadastral group at the annual UGIC Conference in Logan (April 2011).

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Transcript of "Utah SGID: Parcel Layer Activities Update (UGIC 2011)"

  1. 1. Utah Parcels Rick Kelson AGRC [email_address]
  2. 2. AGRC now has parcel data from all 29 counties ! <ul><li>Some counties submit the entire countywide parcel dataset while others only submit the private land parcels </li></ul><ul><li>Some counties have come a long way in the last couple of years but others still have quite a bit of work ahead: </li></ul><ul><ul><li>Adding new parcels </li></ul></ul><ul><ul><li>Subdividing parcels </li></ul></ul><ul><ul><li>Attributing parcels </li></ul></ul><ul><ul><li>Tying parcels to new section corners </li></ul></ul>1,369,876 Total Parcels
  3. 3. Parcel Accuracy <ul><li>Counties maintain their parcel datasets differently: </li></ul><ul><ul><li>From COGO description </li></ul></ul><ul><ul><li>’ Pretty Picture’ GIS representation </li></ul></ul><ul><ul><li>Sometimes both </li></ul></ul>
  4. 4. Parcel Attributes <ul><li>These are the only seven attributes we distribute with the parcel data </li></ul><ul><li>Using PARCEL_ID we can ‘Join’ the parcel layer to the county tax roll and populate other fields if they are not already in the parcel data </li></ul><ul><li>Thoughts of adding more attributes to the parcel schema: </li></ul><ul><ul><li>SERIAL_NUM in addition to PARCEL_ID </li></ul></ul><ul><ul><li>UNIQUE_ID that could be a combination of PARCEL_ID and county FIPs code </li></ul></ul>
  5. 5. <ul><li>Private Land Ownership </li></ul><ul><li>BLM Land </li></ul><ul><li>State Trust Lands </li></ul><ul><li>National Forest Land </li></ul><ul><li>Incorporated City Property </li></ul><ul><li>Federal Land Ownership </li></ul><ul><li>County Property </li></ul><ul><li>State Land (non SITLA) </li></ul><ul><li>Other </li></ul><ul><li>Vacant </li></ul><ul><li>Unknown </li></ul><ul><li>any combination of numbers between 1 to 999 </li></ul>Currently ownership type information comes from the counties populated with any number of different attributes including: But most of the time it is blank or nonexistent <ul><li>F </li></ul><ul><li>T </li></ul><ul><li>BTF </li></ul><ul><li>NTF </li></ul><ul><li>SAF </li></ul><ul><li>SAT </li></ul><ul><li>Common Area </li></ul><ul><li>State of Utah </li></ul><ul><li>Park </li></ul><ul><li>Pit </li></ul><ul><li>County </li></ul><ul><li>Government </li></ul><ul><li>USA </li></ul><ul><li>Subdiv </li></ul><ul><li>IR </li></ul><ul><li>Mineral </li></ul><ul><li>NPS </li></ul><ul><li>ROW </li></ul><ul><li>ROW </li></ul><ul><li>Rec </li></ul><ul><li>USFWS </li></ul>
  6. 6. Parcel Attributes The OWN_TYPE field is populated using a ‘spatial join’ with the SGID Land Ownership’s very generalized OWNER attribute field <ul><li>Federal </li></ul><ul><li>Private </li></ul><ul><li>State </li></ul><ul><li>Tribal </li></ul>Unfortunately this process does not meet everyone's needs and must be revised <ul><li>SITLA-BLM need the attribute populated by the county so they can use it to check and quality control the Land Ownership dataset they produce </li></ul><ul><ul><li>The discrepancies between the counties and Land Ownership can greatly affect the current tax revenue flowing in and out of the counties, currently and in the future. </li></ul></ul><ul><ul><li>The discrepancies also effect the accuracy of land available for sale through land swaps and further affect the tax revenue in the county. </li></ul></ul><ul><ul><li>Other decision making issues </li></ul></ul>
  7. 7. Utah Parcel Viewer and Download Application
  8. 8. Utah Parcel Viewer and Download Application
  9. 9. Utah Parcel Viewer and Download Application
  10. 10. Utah Parcel Viewer and Download Application
  11. 11. Utah Parcel Viewer and Download Application
  12. 12. Custom County Parcel Viewer Application <!-- CUSTOM PARCEL VIEWER, specify county id and size --> <div id='agrcParcelViewer' dojoType='agrc.widgets.viewer.ParcelViewer' county_num= '13' style='width: 800px; height: 500px;'></div> <!-- SCRIPT TAG TO LOAD CUSTOM DIJIT --> <script type='text/javascript' src=' http://dagrc.utah.gov/widgets/dojo/agrc/widgets/viewer/ParcelViewerLoader.js '></script>
  13. 13. Custom County Parcel Viewer Application
  14. 14. Custom County Parcel Viewer Application
  15. 15. Custom County Parcel Viewer Application
  16. 16. Custom County Parcel Viewer Application
  17. 17. Address Points Derived From Parcels <ul><li>Recently there has been a large push to create a statewide database of address points </li></ul><ul><ul><li>Collecting GPS points or digitizing points would be very time consuming and painful if not impossible </li></ul></ul><ul><li>Luckily there are many existing data resources from which to get started: </li></ul><ul><ul><li>Tables of know addresses </li></ul></ul><ul><ul><li>Street center lines with address ranges </li></ul></ul><ul><ul><li>Parcels that carry addresses </li></ul></ul>
  18. 18. Address Points Derived From Parcels <ul><li>Converting parcels to address points presents several hurdles: </li></ul><ul><ul><li>Many parcels can share the same address </li></ul></ul><ul><ul><li>A parcel can contain several addresses </li></ul></ul><ul><ul><li>Some parcels do not have an address and never will </li></ul></ul><ul><ul><li>The centroid is easy to get for a parcel but ideally the address point is the primary building OR at a frontage point near the address's primary access point to the road network </li></ul></ul>
  19. 19. Address Points Derived From Parcels <ul><li>Bert Granberg from the AGRC has developed some VBA code that attempts to convert a set of merged ‘Address Polygon’ derived from the parcels into address points. The code: </li></ul><ul><ul><ul><li>Takes the existing parcel polygons from the SGID </li></ul></ul></ul><ul><ul><ul><li>Merges together adjacent polygons with the same address </li></ul></ul></ul><ul><ul><ul><li>Generates address points </li></ul></ul></ul><ul><ul><ul><li>Positions address points close to the street with the same address and street name </li></ul></ul></ul>
  20. 20. Address Points Derived From Parcels Raw parcels
  21. 21. Address Points Derived From Parcels Address Polygons (shown in red, gray lines indicate parcel boundaries that were removed)
  22. 22. Address Points Derived From Parcels Address Points (frontage style)
  23. 23. Questions ? Rick Kelson AGRC [email_address]
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