MetroGIS Regional Parcel Dataset

An Overview

Areal Coverage • 7 Counties – Anoka, Carver,

Dakota, Hennepin, Ramsey, Scott and Washington

• Area : 6,924 km2

• Polygon: one record for each real estate/tax parcel

• Point: provides information where multiple tax parcels are represented by a single polygon (e.g., condominiums)

• Polygon counts: 962,653• Point counts: 1,061,182

http://www.datafinder.org/metadata/metrogis_regional_parcels.htm

Temporal Coverage

• 2002 – 2006 polygon shapefiles for 7 counties

Year Anoka Carver Dakota Hennepin Ramsey Scott Washington

2002 116,908 127,846 349,662 148,196 45,794 89,491

2003 119,516 31,906 129,463 352,024 148,196 47,407

2004 124,042 32,910 130,989 353,759 148,266 49,958 93,794

2005 125,852 35,197 134,302 354,778 148,724 52,989 96,303

2006 129,392 37,021 135,586 358,064 148,967 54,741 97,922

Temporal change in the number of parcels by County, 2002 - 2006

Attributes • 61 attributes/fields

• 8 numeric fields: polygon acreage, deeded acreage, estimated market value (EMV) of land, EMV-building, EMV-total, tax capacity, total tax, special assessments

• 3 date fields (last sale date, Ag. Preserve enrolled and expiration)

• Year built? Given – numeric field but should be a date field

• All other fields are text/stringhttp://www.datafinder.org/metadata/MetroGIS_Regional_Parcels_Attributes.pdf

Attribute Completeness Assessment (Updated April, 2007)

The selected attributes are present for at least 3 counties and above 90% of completeness report

Attribute Type Anoka Carver Dakota Hennepin Ramsey Scott Washington

Unique County ID

Text Y Y Y Y Y Y Y

Unique Parcel ID

Text Y Y Y Y Y Y Y

City (Actual)

Text Y Y Y Y Y Y Y

City (Mailing)

Text Y Y Y

Polygon Acreage

Num Y Y Y Y Y Y

Use-Type1 Text Y Y Y Y Y Y Y

Multiple Use Type

Text Y Y Y

Owner Name

Text Y Y Y Y Y Y

Attribute Completeness Assessment (Updated April, 2007)

The selected attributes are present for at least 3 counties and above 90% of completeness report

Attribute Type Anoka Carver Dakota Hennepin Ramsey Scott Washington

Owner Address

Text Y Y Y Y Y

Tax Payer Name

Text Y Y Y Y

Tax Payer

Address

Text Y Y Y Y

Homestead Status

Text Y Y Y Y Y Y Y

EMV land Num Y Y Y Y Y Y Y

EMV - Total Num Y Y Y Y Y Y Y

Tax Capacity

Num Y Y Y Y

Total Tax Num Y Y Y Y

Attribute Completeness Assessment (Updated April, 2007)

The selected attributes are present for at least 3 counties and above 90% of completeness report

Attribute Type Anoka Carver Dakota Hennepin Ramsey Scott Washington

Tax Exempt Status

Text Y Y Y Y Y

School Districts

Text Y Y Y Y Y Y Y

Watershed District

Text Y Y Y Y Y Y Y

Green Acres

Text Y Y Y Y

Agricultural

Preserve

Text Y Y Y

Parcel Polygon to Point and PIN Rel

Num Y Y Y Y

http://www.datafinder.org/metadata/MetroGIS_Regional_Parcels_Attributes.pdf

Examples of Incomplete Attribute

• Two fields indicate multiple uses for parcels, both are not used by all counties and are incomplete– Multiple Uses -- > 90% for Carver, Dakota, Ramsey;

minimal or no data for rest– Use Type 2 -- < 2% complete for all counties

• EMV – Buildings– > 90% complete for Ramsey & Hennepin– 74% - 86% for others

Examples of Incomplete Attributes

• 10 fields indicate characteristics of structures on parcels– Most of these are <90% complete and have

values for only two or three counties– Only one (year built) has values for all

counties

• Sale dates and values– <64% complete for all counties– Dates covered vary (e.g., Hennepin: 1970-

12/06, Carver: 1982-12/06, Anoka 2000-12/06)

Attri-bute

Anoka Carver Dakota Hen-nepin

Ramsey Scott Washing-ton

Dwell-ing Type

65 residential and non-residential categories based on use

Not used 67 residential and non-residential categories based on use

Not used

16 residential categories based mainly on # of units

Not used Not used

Hous-ing Style

120 residential and non-residential categories

15 residential categories based on architectural style

8 single-family residential categories related to # of stories

Not used

17 residential categories based on architectual style

19 residential categories based on construction material, # of stories, or architectural style

26 residential categories based on construction material, use, and # of stories

Data Quality and Consistency• Many counties use different classification schemes

for text variables (e.g., Use Type 1, Dwelling Type, Home Style, Heating, Cooling)

• Inconsistency in classification schemes complicates multi-county analyses

• Additionally, inaccuracies may exist in field completion that further complicate analyses

Data Quality and Consistency