FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION

TITLE: PARCELS DISSOLVED BY DECADE OF ACTUAL YEAR BUILT - FLORIDA DOT DISTRICT 2 - 2010

Geodataset Name:       YB_DECADES_D2_2010
Geodataset Type:       SHAPEFILE
Geodataset Feature:    Polygon
Feature Count:         349180
GENERAL DESCRIPTION:
This dataset contains parcels dissolved by the decade of the actual year built for each respective parcel polygon. Parcel boundaries and parcel attribute information including actual year built was obtained from the Florida Department of Revenue's tax database. Actual Year Built for each parcel polygon represents the original year that the structure / building on the property was built. Effective Year Built represents the last date which the structure / building was updated / renovated, etc. This is an update to the FGDL YB_DECADES_D2_2009.shp data layer.
DATA SOURCE(S):                    University of Florida GeoPlan Center
SCALE OF ORIGINAL SOURCE MAPS:     VARIOUS
GEODATASET EXTENT:                 FDOT District Specific - (D2)
PUBLICATION DATE: 20110323 TIME PERIOD OF CONTENT: 20101220 DOWNLOAD LINK: http://www.fgdl.org/metadataexplorer/explorer.jsp

FEATURE ATTRIBUTE TABLES:

Datafile Name: YB_DECADES_D2_2010.DBF
ITEM NAME WIDTH TYPE
OBJECTID
4 OID
Shape
4 Geometry
YB_DECADE
30 String
PAR_COUNT
4 Integer
ACRES
8 Double
PAR_PER_AC
8 Double
DESCRIPT
30 String
FGDLAQDATE
36 Date
AUTOID
4 Integer
SHAPE.AREA
0 Double
SHAPE.LEN
0 Double

FEATURE ATTRIBUTE TABLES CODES AND VALUES:

Item
Item Description
OBJECTID Internal feature number.

Shape Feature geometry.

YB_DECADE The range of the actual year builts by decades.

PAR_COUNT Number of individual parcels in dissolved polygon. Please Note: Some Multi-part Parcels have been split during the Single Part Dissolve process, for those polygons there will be only one record for the actual parcel count, which will result in a few of these features having a PARCOUNT = 0. One Example would be a Multi-part Parcel which contains two separate polygons split by a road, there is only one centroid created for the count field, so one of the halves will have a PARCOUNT = 1 while the other will have a PARCOUNT = 0. Since there isn't that many Multi-part parcels this should affect less than 3% of the records.

ACRES Number of Acres.

PAR_PER_AC Number of parcels per acre.

DESCRIPT Based on YB_DECADE.

FGDLAQDATE The date FGDL acquired the data from the source.

AUTOID Unique ID added by GeoPlan

SHAPE.AREA Area in meters

SHAPE.LEN Perimeter in meters


USER NOTES:
This data is provided 'as is'. GeoPlan relied on the integrity of the original data layer's topology
This data is provided 'as is' by GeoPlan and is complete to our knowledge.
GeoPlan relied on the integrity of the attribute information within
the original data.
FDOT District 1

    SOUTHWEST FLORIDA
    * Major cities: Arcadia, Bartow, Bradenton, Fort Myers, Lakeland,
                    Naples, North Port, Sarasota, Sebring, and Venice.
    
    * Counties: Charlotte, Collier, De Soto, Glades, Hardee, Hendry,
                Highlands, Lee, Manatee, Okeechobee, Polk, and Sarasota.

FDOT District 2

    NORTHEAST FLORIDA
    * Major cities: Gainesville, Jacksonville, Lake City, Palatka, Perry,
                    Saint Augustine, and Starke.
    
    * Counties: Alachua, Baker, Bradford, Clay, Columbia, Dixie, Duval,
                Gilchrist, Hamilton, Lafayette, Levy, Madison, Nassau, Putnam,
                St. Johns, Suwannee, Taylor, and Union.

FDOT District 3

    NORTHWEST FLORIDA
    * Major cities: Apalachicola, Chipley, Crestview, Fort Walton Beach,
                    Marianna, Panama City, Pensacola, Quincy, and Tallahassee.
    
    * Counties: Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf, Holmes,
                Jackson, Jefferson, Leon, Liberty, Okaloosa, Santa Rosa, Wakulla,
                Walton, and Washington.

FDOT District 4

    SOUTHEAST FLORIDA
    * Major cities: Belle Glade, Boca Raton, Fort Lauderdale, Fort Pierce,
                    Hollywood, Pompano Beach, Stuart, Vero Beach, and West Palm Beach.
    
    * Counties: Broward, Indian River, Martin, Palm Beach, and St. Lucie.

FDOT District 5

    CENTRAL FLORIDA
    * Major cities: Daytona Beach, DeLand, Melbourne, Merritt Island, Ocala,
                    Orlando, and Titusville.
    
    * Counties: Brevard, Flagler, Lake, Marion, Orange, Osceola, Seminole,
                Sumter, and Volusia.

FDOT District 6

    SOUTH FLORIDA
    * Major cities: Coral Gables, Hialeah, Key West, and Miami.
    
    * Counties: Miami-Dade and Monroe.

FDOT District 7

    WEST CENTRAL FLORIDA
    * Major cities: Brooksville, Clearwater, Dunedin, Largo, New Port Richey,
                    St. Petersburg, and Tampa.
    
    * Counties: Citrus, Hernando, Hillsborough, Pasco, and Pinellas.

"The data was created to serve as base information for use in GIS
systems for a variety of planning and analytical purposes."

This data is provided 'as is' and its horizontal positional accuracy has not been verified by GeoPlan

This data is provided 'as is' and its vertical positional accuracy has not been verified by GeoPlan

NONE

The Florida Geographic Data Library is a collection of Geospatial Data
compiled by the University of Florida GeoPlan Center with support from
the Florida Department of Transportation. GIS data available in FGDL is
collected from various state, federal, and other agencies (data sources)
who are data stewards, producers, or publishers. The data available in
FGDL may not be the most current version of the data offered by the
data source. University of Florida GeoPlan Center makes no guarantees
about the currentness of the data and suggests that data users check
with the data source to see if more recent versions of the data exist.

Furthermore, the GIS data available in the FGDL are provided 'as is'.
The University of Florida GeoPlan Center makes no warranties, guaranties
or representations as to the truth, accuracy or completeness of the data
provided by the data sources. The University of Florida GeoPlan Center
makes no representations or warranties about the quality or suitability
of the materials, either expressly or implied, including but not limited
to any implied warranties of merchantability, fitness for a particular
purpose, or non-infringement. The University of Florida GeoPlan Center
shall not be liable for any damages suffered as a result of using,
modifying, contributing or distributing the materials.

A note about data scale: 

Scale is an important factor in data usage.  Certain scale datasets
are not suitable for some project, analysis, or modeling purposes.
Please be sure you are using the best available data. 

1:24000 scale datasets are recommended for projects that are at the
county level.
1:24000 data should NOT be used for high accuracy base mapping such
as property parcel boundaries.
1:100000 scale datasets are recommended for projects that are at the
multi-county or regional level.
1:125000 scale datasets are recommended for projects that are at the
regional or state level or larger.

Vector datasets with no defined scale or accuracy should be
considered suspect. Make sure you are familiar with your data
before using it for projects or analysis. Every effort has been
made to supply the user with data documentation. For additional
information, see the References section and the Data Source Contact
section of this documentation. For more information regarding
scale and accuracy, see our webpage at:
http://geoplan.ufl.edu/education.html

REFERENCES:
Department of Revenue:

http://dor.myflorida.com/dor/property/

DATA LINEAGE SUMMARY:
GeoPlan received county wide parcels datasets from the
Florida Department of Revenue (FDOR) in 2010 via FTP.

The datasets were in shapefile format, and in the following projections: 
State Plane Projection NAD 83, Feet (East, North, and West). 
The datasets were projected to FGDL Albers HPGN.

Process for dissolving parcel polygons based on decade of actual year built:

- For each county a new field representing Actual Year Built [AYRBLT] was 
populated based on the attribute table information for the following fields; 
ACTYRBLT and AYRB.
  - First [AYRBLT] was set equal to ACTYRBLT,
  - Next a selection set was created where [AYRBLT] = 0, 
    these selected features were set equal to AYRB.

- The [AYRBLT] field was then repopulated as ((Mid[AYRBLT], 1, 3) & "0")
  Ex. 1999 becomes 1990.

- The parcel polygon boundaries were then Dissolved 
(as single part features) based on the Actual Year Built [AYRBLT] field.

- The Dissolved layers were then run through the Repair Geometry Command 3x.

- Next the Dissolved Layers were then run through the Integrated Command at 1m.

- The Dissolved layers were then run through the Repair Geometry Command 3x.

- A spatial Join was then run with the Dissolved Layers and they corresponding 
Full County Parcel Label Points in order to get Parcel Count for each dissolved feature.

- The shapefiles were then merged together based on the FDOT 
District that each County fell in, creating seven district wide shapefiles.

- The [DECADE] field was then renamed [YB_DECADE].

- The final shapefile represents polygons of parcels which 
structures/ buildings were originally built in the same decade.

- Several other fields were added to the attribute table:
   [DESCRIPT] - Based on [YB_DECADE]
   [FGDLAQDATE] - The date FGDL acquired the original data from the Source.
Process Date: 20110323

Data imported to ArcSDE and exported as a shapefile. Process Date: 20110408
MAP PROJECTION PARAMETERS:

Projection                          ALBERS
Datum                               HPGN
Units                               METERS
Spheroid                            GRS1980
1st Standard Parallel               24  0  0.000
2nd Standard Parallel               31 30  0.000
Central Meridian                   -84 00  0.000
Latitude of Projection's Origin     24  0  0.000
False Easting (meters)              400000.00000
False Northing (meters)             0.00000

DATA SOURCE CONTACT (S):

Name:
Abbr. Name:
Address:


Phone:

Web site:
E-mail:
Contact Person:
         Phone:
        E-mail:
University of Florida GeoPlan Center
FGDL
431 ARCH BLDG
Gainesville, FL
32611


http://www.fgdl.org data@fgdl.org

FGDL CONTACT:
Name:                   FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name:             FGDL
Address:                Florida Geographic Data Library
                        431 Architecture Building
                        PO Box 115706
                        Gainesville, FL  32611-5706
Web site:               http://www.fgdl.org

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