Earth Systems Research Center, University of New Hampshire 20170712 One vector digital data Durham, New Hampshire Earth Systems Research Center, University of New Hampshire None <URL:http://www.granit.unh.edu/cgi-bin/nhsearch?dset=lu2015/nh> Earth Systems Research Center, University of New Hampshire 19860101 Durham, New Hampshire Earth Systems Research Center, University of New Hampshire <URL:http://www.granit.unh.edu> This data set contains detailed land use data (polygons) for 45 communities in southeastern New Hampshire. The primary source used to map the land use was high resolution (1-foot), true color aerial photography, collected in the spring of 2015. Data development was completed by Rockingham Planning Commission (27 communities) and Strafford Regional Planning Commission (18 communities), with GRANIT providing technical support, metadata development, and standardizing/merging of the datasets into a regional product. These photo-interpreted land use data are intended for use by state, regional, and municipal resource managers, planning agencies, and other stakeholders. Data distribution tile: full 45-town coverage area 2015 source photography date Complete Irregular -71.45251 -70.69919 43.57577 42.73424 None Land use Landuse Land cover Landcover Photo interpretation None United States Northeast New England New Hampshire Carroll County Rockingham County Strafford County Atkinson Barrington Brentwood Brookfield Danville Dover Durham East Kingston Epping Exeter Farmington Fremont Greenland Hampstead Hampton Hampton Falls Kensington Kingston Lee Madbury Middleton Milton New Castle New Durham Newfields Newington Newmarket Newton North Hampton Northwood Nottingham Plaistow Portsmouth Raymond Rochester Rollinsford Rye Salem Sandown Seabrook Somersworth South Hampton Strafford Stratham Wakefield None Not for legal use. GRANIT Database Manager Earth Systems Research Center GRANIT Database Manager mailing and physical address

Morse Hall, University of New Hampshire

Durham NH 03824 US 603-862-1792 603-862-0188 granit@unh.edu 8:30AM-5PM, EST <URL:http://www.granit.sr.unh.edu/cgi-bin/load_file?PATH=/data/database/d-webdata/lu/lu2015/browse.gif> gif image file GIF GRANIT database, Earth Systems Research Center, University of New Hampshire ESRI ArcGIS 10x Data were digitized on-screen by photo-interpreting the 1-foot resolution aerial photography. Attribute coding was checked by on-screen overlay of the delineated land use polygons, displayed using transparent symbology, on the source photography. This scrutiny detected any missing or erroneously labeled polygons. Data capture occurred at a scale of no less than 1:2,400. Evaluation occurred at a scale of 1:5,000. In addition, code domain checks ensured that only valid codes were assigned to features, and polygon "dissolve" operations identified any cases where adjacent polygons shared the same land use code. Polygon and arc-node topology exists. Topology checks were used to identify and eliminate any sliver polygons, dangling nodes, and/or other potential errors. The complete 45-town area was mapped and classified. Data were generated primarily from interpretation of the 1-ft. resolution photos. However, variable scale vector data sets, as well as computer scripts, were used as guides to digitize certain land use polygons (see Process Steps). Quantum Spatial 2016 Earth Systems Research Center, University of New Hampshire 2011 online online 2015 source photography date 2010 source photography date ORTHO2015 LU2010 Provided the basic source photography for the delineation and interpretation of the land use features. Provided the initial land use delineations that were updated to 2015. A set of data standards was developed to govern key technical components of the land use mapping, including definitions of the land use classes and identification of feature automation protocols. The land use classification codes were based on a hybrid of the USGS Anderson land-use and land-cover classification system (Levels I and II), (http://landcover.usgs.gov/classes.html), as modified to satisfy the modeling component of a previously-funded CICEET project. Note also that the residential mapping protocols, described further below, were developed jointly with staff from the Rockingham Planning Commission, Exeter, NH, and were reviewed/approved by staff from the Strafford Regional Planning Commission, Dover, NH. 2008 LUSTANDARDS.doc Land use features were digitized by displaying the 2010 and use data over the 2015 orthophography, and "heads-up" interpretation of features that appeared to change over the 5-year period. Features were generally digitized to the visible extent of their edge as interpreted by the analyst. The mapping of the residential class was subject to additional delineation "rules". As with other classes, features were digitized to visible use boundaries when possible. In these cases, yard edges/natural features guided the delineation. However, where boundaries (or partial boundaries) were indistinct, one of several approaches was utilized: 1a) For indistinct boundaries of houses within 250' of one another and within public water/sewer zones (based on TOWN_SW): a .5-acre circle centered on the edge of the structure furthest from the associated road was used as a guide for the polygon delineation. 1b) For indistinct boundaries of houses within 250' of one another and outside of public water/sewer zones (based on TOWN_SW): the 1a) protocol was applied using a 1-acre circle. 2a) For indistinct boundaries of houses greater than 250' apart and within public water/sewer zones (based on TOWN_SW): a .5-acre box was generated, centered on the structure (or centered in the approximate midpoint of multiple structures on what appeared to be a single parcel). If the structure(s) was within 700' of a road, the box was oriented parallel to the nearest road. In cases where the rotated box intersected the road edge, it was repositioned further away from the road to preserve as much of the box area as possible. Where the box intersected the road buffer, the road edge became the polygon edge. In these cases, the box became somewhat smaller than the original .5-acre. If the house was further than 700' from the road, or did not appear to be associated with a nearby road, the box was not rotated. 2b) For indistinct boundaries of houses greater than 250' apart and outside of public water/sewer zones (based on TOWN_SW): the 2a) protocol was applied using a 1-acre box. Note that forested areas that were completely enclosed within a developed polygon were assumed to "belong" to the developed polygon, and were generally not distinguished. LU2010 ORTHO2015 LUSTANDARDS.doc 2017 The land use feature delineations were checked by visually checking the symbolized features displayed over the source DOQs. Modifications were made, as warranted, during the quality control process - to correct incorrectly classed lands, and to fix digitizing errors such as overshoots and sliver polygons. 2017 The individual regional land use data sets (from Rockingham Planning Commission and Strafford Regional Planning Commission) were provided to GRANIT at UNH, where attributes where attributes were standardized and the data sets were merged. No additional QC or processing was performed on the composite data set. 2017 Vector Complete chain 61808 State Plane Coordinate System 1983 2800 0.999967 -71.666667 42.500000 984250.000000 0.000000 coordinate pair 0.000512 0.000512 survey feet North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 The dataset includes 7 attributes, as follows: 1. LU4 - 4-digit integer describing the land use feature. See LUSTANDARDS.doc for further information on the code values. 2. LU4_Desc - a text field containing the description of LU4 3. Developed - a 0/1 field to flag land use features that are considered developed. A value of 1 was applied to all land use codes in the general "Urban and Built-up Land" category (all LU4 codes between 1120 and 1800), as well as the features coded as "Other Agricultural Land" (LU4 code 2900). 4. Town - a text field containing the town name 5. FIPS - 4-digit Federal Information Processing System code for the town 6. RPA - with value of 8 (Rockingham Planning Commission) or 9 (Strafford Regional Planning Commission) 7. Acres - the size of the land use feature as calculated by the software. None Earth Systems Research Center, University of New Hampshire GRANIT Database Manager GRANIT Database Manager mailing and physical address

Morse Hall, University of New Hampshire

Durham NH 03824 US 603-862-1792 603-862-0188 granit@unh.edu 8:30AM-5PM. EST Downloadable Data Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Earth Systems Research Center, under contract to the NH Office of Energy and Planning, and in consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these data. OEP, ESRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of these data. ESRI shapefile 90 MB <URL: http://www.granit.unh.edu> No charge when downloaded from the Internet. Cost of reproduction for provision on CD/ROM or other media. Email GRANIT (granit@unh.edu) or order from web site (www.granit.unh.edu). Two weeks. None. 20170712 Earth Systems Research Center, University of New Hampshire GRANIT Database Manager GRANIT Database Manager mailing and physical address

Morse Hall, University of New Hampshire

Durham NH 03824 603-862-1792 603-862-0188 granit@unh.edu 8:30AM-5PM, EST FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile