Graph and download economic data for Housing Inventory: Active Listing Count in Gwinnett County, GA (ACTLISCOU13135) from Jul 2016 to Feb 2025 about Gwinnett County, GA; Atlanta; active listing; GA; listing; and USA.

This layer was developed by the Research & Analytics Division of the Atlanta Regional Commission and is a generalized landcover database designed for Regional Planning with a landuse component used for forecasts and modeling at ARC. LandPro2009 should not be taken out of its Regional context, though county-level or municipal-level analysis may be useful for transportation, environmental and landuse planning. LandPro2009 is ARC's landuse/landcover GIS database for the 21-county Atlanta Region (Cherokee, Clayton, Cobb, DeKalb, Douglas, Fayette, Fulton, Gwinnett, Henry, Rockdale, the EPA non-attainment (8hr standard) counties of Carroll, Coweta, Barrow, Bartow, Forsyth, Hall, Newton, Paulding, Spalding and Walton and Dawson which will become a part of the 2010 Urbanized Area). LandPro2009 was created by on-screen photo-interpretation and digitizing of ortho-rectified aerial photography at a scale of 1:14,000. The primary source for this GIS database was 2009 true color imagery with 1.64-foot pixel resolution, provided by Aerials Express, Inc.Though the terms are often used interchangeably, landuse and landcover are not synonymous. Landcover generally refers to the natural or cultivated vegetation, rock, or water covering the land, as well as the developed surface which can be identified on aerial photography. Landuse generally refers to the way that humans use or will use the land, regardless of its apparent landcover. Collateral data for the landcover mapping effort included the Aero Surveys of Georgia street atlas, the Georgia Department of Community Affairs (DCA) Community Facilities database and the USGS Digital Raster Graphics (DRGs) of 1:24,000 scale topographic maps. The landuse component of this database was added after the landcover interpretation was completed, and is based primarily on ownership information provided by the 20 counties and the City of Atlanta for larger tracts of undeveloped land that meet the landuse definition of "Extensive Institutional" or "Park Lands" (refer to the Code Descriptions and Discussion section below). Although some of the boundaries of these tracts may align with visible features from the aerial photography, these areas are generally "non-photo-identifiable," thus require other sources for accurate identification. The landuse/cover classification system is adapted from the USGS (Anderson) classification system, incorporating a mix of level I, II and III classes. There are a total of 25 categories in ARC's landuse/cover system (described below), 2 of which are used only for landuse designations: Park Lands (Code 175) and Extensive Institutional (Code 125). The other 23 categories can describe landuse and/or landcover, and in most cases will be the same. The LU code will differ from the LC code only where the Park Lands (Code 175) and Extensive Institutional (Code 125) land holdings have been identified from collateral sources of land ownership.Although similar to previous eras of ARC landuse/cover databases developed before 1999 (1995, 1990 etc.), "LandPro" differs in many significant ways. Originally, ARC's landuse and landcover database was built from 1975 data complied by USGS at scales of 1:100,000 and selectively, 1:24,000. The coverage was updated in 1990 using SPOT satellite imagery and low-altitude aerial photography and again in 1995 using 1:24,000 scale panchromatic aerial photography. Unlike these previous 5-year updates, the 1999, 2001, 2003, 2005 2007, 2008 and now 2009 LandPro databases were compiled at a larger scale (1:14,000) and do not directly reflect pre-1999 delineations. In addition, all components of LandPro were produced using digital orthophotos for on-screen photo-interpretation and digitizing, thus eliminating the use of unrectified photography and the need for data transfer and board digitizing. As a result, the positional accuracy of LandPro is much higher than in previous eras. There have also been some changes to the classification system prior to 1999. Previously, three categories of Forest (41-deciduous, 42-coniferous, and 43-mixed forest) were used; this version does not distinguish between coniferous and deciduous forest, thus Code 40 is used to simply designate Forest. Likewise, two categories of Wetlands (61-forested wetland, and 62-non-forested wetland) were used before; this version does not distinguish between forested and non-forested wetlands, thus Code 60 is used to simply designate Wetlands. With regard to Wetlands, the boundaries themselves are now based on the National Wetlands Inventory (NWI) delineations along with the CIR imagery. Furthermore, Code 51 has been renamed "Rivers" from "Streams and Canals" and represents the Chattahoochee and Etowah Rivers which have been identified in the landuse/cover database. In addition to these changes, Code 52 has been dropped from the system as there are no known instances of naturally occurring lakes in the Region. Finally, the landuse code for Park Lands has been changed from 173 to 175 so as to minimize confusion with the Parks landcover code, 173. There has been a change in the agriculture classification for LandPro2005 and any LandPro datasets hereafter. Previously, four catagories of agriculture (21- agriculture-cropland and pasture, 22 - agriculture - orchards, 23 - agriculture - confined feeding operations and 24 - agriculture - other) were used; this version does not distinguish between the different agricultural lands. Code 20 is now used to designate agriclture. Due to new technology and the enhancements to this database, direct comparison between LandPro99, LandPro2001, LandPro2003 and landPro2005 and all successive updates are now possible, with the 1999 database serving as ARC's new baseline. Please note that as a result of the 2003 mapping effort, LandPro2001 has been adjusted for better comparison to LandPro2003 and is named "LandPro01_adj." Lilkewise, LandPro99 was previously adjusted when LandPro2001 was completed, but was not further adjusted following the 2003 update. Although some adjustments were originally made to the 1995 landuse/cover database for modeling applications, direct comparisons to previous versions of ARC landuse/cover before 1999 should be avoided in most cases.

Classification System:

111: Low Density Single Family Residential - Areas that have generally been developed for single family residential use, usually with a significant mix of forested or agricultural landcover. These areas often occur on the periphery of urban expansion and are generally characterized by houses on 2 to 5 acre lots. Some examples of this category include rural housing, estates, and linear residential developments along transportation routes.

112: Medium Density Single Family Residential - Areas that have predominantly been developed for single family residential use, with or without a significant mix of forested or agricultural landcover. These areas usually occur in urban or suburban zones and are generally characterized by houses on 1/4 to 2 acre lots. This category accounts for the majority of residential landuse in the Region and includes a wide variety of neighborhood types.

113: High Density Residential - Areas that have predominantly been developed for concentrated single family residential use. These areas occur almost exclusively in urban neighborhoods with streets on a grid network, and are characterized by houses on lots smaller than 1/4 acre, but may also include mixed residential areas with duplexes and small apartment buildings.

117: Multifamily Residential - Residential areas comprised predominantly of apartment, condominium and townhouse complexes where net density generally exceeds eight units per acre. Typical apartment buildings are relatively easy to identify, but some high rise structures may be interpreted as, or combined with, office buildings, though many of these dwellings were identified and delineated in downtown and midtown for the first time with the 2003 update. Likewise, some smaller apartments and townhouses may be interpreted as, or combined with, medium- or high-density single family residential. Housing on military bases, campuses, resorts, agricultural properties and construction work sites is not included in this or other residential categories.

119: Mobile Home Parks - Areas that have been developed for single family mobile home use. These residential areas may occur in urban, suburban, or rural zones throughout the Region, with or without a significant mix of forested landcover. Due to their sparse distribution, individual mobile homes are generally mapped with the Forest landcover (Code 40) and Low- or Medium-Density Residential (Codes 111 and 112, respectively).

12: Commercial and Services - Areas used predominantly for the sale of products and services, including urban central business districts, shopping centers in suburban and outlying areas, commercial strip developments, junk yards and resorts. The main buildings, secondary structures and areas supporting the basic use are all included: office buildings, warehouses, driveways, sheds, parking lots, landscaped areas, waste disposal areas, etc. Commercial areas may include some non-commercial uses too small to be separated out. Central business districts commonly include some institutions such as churches and schools, and commercial strip developments may include some residential units.

121: Intensive Institutional - The built-up portions of institutional land holdings, including all buildings, grounds and parking lots that compose educational, religious, health, correctional and military facilities. Institutions occupying small areas (for example, many churches and some elementary and secondary schools) may be included in

This layer was developed by the Research & Analytics Division of the Atlanta Regional Commission and is a generalized landcover database designed for Regional Planning. Although it has a landuse component which is used for forecasts and modeling at ARC, outside users should be aware that the landcover and landuse delineations are based on photo-interpretation of a 5-acre and 25-acre minimum mapping unit respectively, not parcels. Likewise, LandPro2007 should not be taken out of its Regional context, though county-level or municipal-level analysis may be useful for transportation, environmental and landuse planning. LandPro2007 is ARC's landuse/landcover GIS database for the 20-county Atlanta Region (Cherokee, Clayton, Cobb, DeKalb, Douglas, Fayette, Fulton, Gwinnett, Henry, Rockdale, the EPA non-attainment (1hr standard) counties of Forsyth, Paulding and Coweta. and the EPA non-attainment (8hr standard) counties of Carroll, Barrow, Bartow, Hall, Newton, Spalding and Walton). LandPro2005 was created by on-screen photo-interpretation and digitizing of ortho-rectified aerial photography at a scale of 1:14,000. The primary source for this GIS database was 2007 true color imagery with 1.64-foot pixel resolution, provided by Aerials Express, Inc.Though the terms are often used interchangeably, landuse and landcover are not synonymous. Landcover generally refers to the natural or cultivated vegetation, rock, or water covering the land, as well as the developed surface which can be identified on aerial photography. Landuse generally refers to the way that humans use or will use the land, regardless of its apparent landcover. Collateral data for the landcover mapping effort included the Aero Surveys of Georgia street atlas, the Georgia Department of Community Affairs (DCA) Community Facilities database and the USGS Digital Raster Graphics (DRGs) of 1:24,000 scale topographic maps. The landuse component of this database was added after the landcover interpretation was completed, and is based primarily on ownership information provided by the 20 counties and the City of Atlanta for larger tracts of undeveloped land that meet the landuse definition of "Extensive Institutional" or "Park Lands" (refer to the Code Descriptions and Discussion section below). Although some of the boundaries of these tracts may align with visible features from the aerial photography, these areas are generally "non-photo-identifiable," thus require other sources for accurate identification. The minimum mapping unit standard for this database is generally 5 acres, with varying exceptions based on category and context. Some smaller Intensive Institutional (mostly elementary schools), Commercial, Cemeteries, and Reservoirs (impoundments) have been intentionally delineated in some cases throughout the Region. Within the downtown and midtown areas, many small polygons of multi-family residential have been identified and added with the 2003 update and expanded upon in the 2005 and in the 2007 update through research of mostly web-based resources. Within single-family neighborhoods, differentiation of adjacent residential areas (111-low density, 112-medium density, and 113-high density) is generally 25 acres, and within agricultural areas, delineation of some forested areas (Code 40) is occasionally larger. 25 acres is also the minimum mapping consideration for the landuse categories of Extensive Institutional (Code 125) and Park Lands (Code 175). The landuse/cover classification system is adapted from the USGS (Anderson) classification system, incorporating a mix of level I, II and III classes. There are a total of 25 categories in ARC's landuse/cover system (described below), 2 of which are used only for landuse designations: Park Lands (Code 175) and Extensive Institutional (Code 125). The other 23 categories can describe landuse and/or landcover, and in most cases will be the same. The LU code will differ from the LC code only where the Park Lands (Code 175) and Extensive Institutional (Code 125) land holdings have been identified from collateral sources of land ownership.Although similar to previous eras of ARC landuse/cover databases developed before 1999 (1995, 1990 etc.), "LandPro" differs in many significant ways. Originally, ARC's landuse and landcover database was built from 1975 data complied by USGS at scales of 1:100,000 and selectively, 1:24,000. The coverage was updated in 1990 using SPOT satellite imagery and low-altitude aerial photography and again in 1995 using 1:24,000 scale panchromatic aerial photography. Unlike these previous 5-year updates, the 1999, 2001, 2003, 2005 and now 2007 LandPro databases were compiled at a larger scale (1:14,000) and do not directly reflect pre-1999 delineations. In addition, all components of LandPro were produced using digital orthophotos for on-screen photo-interpretation and digitizing, thus eliminating the use of unrectified photography and the need for data transfer and board digitizing. As a result, the positional accuracy of LandPro is much higher than in previous eras. There have also been some changes to the classification system prior to 1999. Previously, three categories of Forest (41-deciduous, 42-coniferous, and 43-mixed forest) were used; this version does not distinguish between coniferous and deciduous forest, thus Code 40 is used to simply designate Forest. Likewise, two categories of Wetlands (61-forested wetland, and 62-non-forested wetland) were used before; this version does not distinguish between forested and non-forested wetlands, thus Code 60 is used to simply designate Wetlands. With regard to Wetlands, the boundaries themselves are now based on the National Wetlands Inventory (NWI) delineations along with the CIR imagery. Furthermore, Code 51 has been renamed "Rivers" from "Streams and Canals" and represents the Chattahoochee and Etowah Rivers which have been identified in the landuse/cover database. In addition to these changes, Code 52 has been dropped from the system as there are no known instances of naturally occurring lakes in the Region. Finally, the landuse code for Park Lands has been changed from 173 to 175 so as to minimize confusion with the Parks landcover code, 173. There has been a change in the agriculture classification for LandPro2005 and any LandPro datasets hereafter. Previously, four catagories of agriculture (21- agriculture-cropland and pasture, 22 - agriculture - orchards, 23 - agriculture - confined feeding operations and 24 - agriculture - other) were used; this version does not distinguish between the different agricultural lands. Code 20 is now used to designate agriclture. Due to new technology and the enhancements to this database, direct comparison between LandPro99, LandPro2001, LandPro2003 and landPro2005 is now possible, with the 1999 database serving as ARC's new baseline. Please note that as a result of the 2003 mapping effort, LandPro2001 has been adjusted for better comparison to LandPro2003 and is named "LandPro01_adj." Lilkewise, LandPro99 was previously adjusted when LandPro2001 was completed, but was not further adjusted following the 2003 update. Although some adjustments were originally made to the 1995 landuse/cover database for modeling applications, direct comparisons to previous versions of ARC landuse/cover before 1999 should be avoided in most cases.

Classification System:

111: Low Density Single Family Residential - Areas that have generally been developed for single family residential use, usually with a significant mix of forested or agricultural landcover. These areas often occur on the periphery of urban expansion and are generally characterized by houses on 2 to 5 acre lots. Some examples of this category include rural housing, estates, and linear residential developments along transportation routes.

112: Medium Density Single Family Residential - Areas that have predominantly been developed for single family residential use, with or without a significant mix of forested or agricultural landcover. These areas usually occur in urban or suburban zones and are generally characterized by houses on 1/4 to 2 acre lots. This category accounts for the majority of residential landuse in the Region and includes a wide variety of neighborhood types.

113: High Density Residential - Areas that have predominantly been developed for concentrated single family residential use. These areas occur almost exclusively in urban neighborhoods with streets on a grid network, and are characterized by houses on lots smaller than 1/4 acre, but may also include mixed residential areas with duplexes and small apartment buildings.

117: Multifamily Residential - Residential areas comprised predominantly of apartment, condominium and townhouse complexes where net density generally exceeds eight units per acre. Typical apartment buildings are relatively easy to identify, but some high rise structures may be interpreted as, or combined with, office buildings, though many of these dwellings were identified and delineated in downtown and midtown for the first time with the 2003 update. Likewise, some smaller apartments and townhouses may be interpreted as, or combined with, medium- or high-density single family residential. Housing on military bases, campuses, resorts, agricultural properties and construction work sites is not included in this or other residential categories.

119: Mobile Home Parks - Areas that have been developed for single family mobile home use. These residential areas may occur in urban, suburban, or rural zones throughout the Region, with or without a significant mix of forested landcover. Due to their sparse distribution, individual mobile homes are generally mapped with the Forest landcover (Code 40) and Low- or