Multiple studies were conducted by the U.S. Geological Survey, in cooperation with the New Hampshire Department of Environmental Services, Water Resources Division, to describe the geohydrology and water quality of stratified-drift aquifers river basins throughout New Hampshire. These studies were published between 1989 and 1998. This shapefile was created by the NH Department of Environmental Services by merging the transmissivity datasets from all the drainage basin study areas. Polygons with no transmissivity values were removed. In areas where study areas overlap, numerous sliver polygons may occur. In these areas, use of the study area-level datasets may provide more consistent data. No formal metadata were created to accompany this shapefile. Aquifer transmissivity is defined as the rate at which water can be transmitted through a unit width of aquifer under a unit hydraulic gradient (Heath 1983). Transmissivity is equal to saturated thickness multiplied by horizontal hydraulic conductivity and is expressed in feet squared per day (ft /d). Data sets available from the 13 studies may include aquifer boundary lines and polygons, transmissivity, saturated thickness, water table, wells, low flow sites, and seismic lines.

As directed by the New Hampshire legislature, the Office of Strategic Initiatives is maintaining this database of wireless communication towers in order to ensure the orderly development of a wireless communications network statewide.

Town Master Plans were used as the primary source document. Data were compiled and automated by 4 Regional Planning Commissions (North Country Council, Lakes Region Planning Commission, Strafford Regional Planning Commission, and Rockingham Planning Commission). Earth Systems Research Center combined the provided data into one continuous database. The attributes collected were not consistent between regions. As a result, there are many empty fields.

The New Hampshire Community Anchor Institutions (CAI) dataset includes data on broadband availability at almost 4,000 institutions in the state. Data was collected for 7 categories of institutions as defined by the National Telecommunications and Information Administration (NTIA), including schools (K-12), libraries, medical/health care facilities, public safety, university/college/other post-secondary, other community support institutions-government, and other community support institutions- nongovernmental. The data set includes the status of broadband availability at each entity, the type of technology delivering broadband service, and the speed of service (down/up). It was generated from information collected by the nine regional planning agencies in NH from the individual institutions, initially via phone and/or email, and subsequently via web-based inventories, and represents broadband availability as of September 30, 2014. Extracts of the data set have been produced for incorporation in various GRANIT online viewing tools. These extracts typically include only the name, address, and type of institution, and do not include the broadband availability information that is part of the full data set. Data collection and analyses was supported by the NTIA under the American Recovery and Reinvestment Act of 2009 (ARRA). See www.ntia.doc.gov/recovery/index.html for further information.

This data set represents smoothed, 2-foot bare earth contours (isolines) for the Suncook River (0107000605) HUC 10 unit. It was derived from a data set which was compiled from LIDAR collections in NH available as of spring, 2019. The raster was filtered using the ArcGIS FOCAL STATISTICS tool with a 3x3 circular neighborhood. The contours were generated using the ArcGIS CONTOUR tool while applying a Z factor of 3.2808 to convert the elevation values from meters to feet. The filtered contours were then smoothed using the ArcGIS SMOOTH LINE tool. The data include an INDEX field with values of 10 and 100 to flag 10 and 100-foot contours. Note on HUC 01060000310: Due to limitations in the source LIDAR data, some anomalies exist in the generated contours in coastal areas of the state. These were left in the data so that users can determine what further processing best meets their application needs.

This data layer contains point locations representing recreation sites (parks, playing fields, water recreation, etc.) for New Hampshire. A companion data set, "OEP Recreation Inventory: Polygons", is also available containing New Hampshire recreation sites extracted from the "Conservation/Public Lands" database.

This data set contains 13 categories of land use data (polygons) for Strafford County, New Hampshire. The primary data used to derive the layer were 1974 1:20,000-scale, black & white, digital orthophotos and 1998 land use data.

This geodatabase contains 2 feature classes: formations (polygon features) and contacts (line features). Both were digitized from the 1:250,000-scale Bedrock Geologic Map of New Hampshire (Lyons and others, 1997). The Bedrock Geologic Map displays the type, location, and geologic age of the rocks underlying the state. The map is a compilation of decades of work by geologists who mapped individual portions of the state at various times. Polygon features found in these data display the location and extent of each mapped bedrock body in the state. Line features found in these data include contacts between individual rock units, and geologic faults.

The 2009 1-meter NAIP image mosaic for New Hampshire (RGB) is composed of 3 band GeoTIFF images acquired from the National Agriculture Imagery Program (NAIP). The NAIP program is administered by USDA FSA and has been established to support two main FSA strategic goals centered on agricultural production. These are, increase stewardship of America's natural resources while enhancing the environment, and to ensure commodities are procured and distributed effectively and efficiently to increase food security. The NAIP program supports these goals by acquiring and providing ortho imagery that has been collected during the agricultural growing season in the U.S. The NAIP ortho imagery is tailored to meet FSA requirements and is a fundamental tool used to support FSA farm and conservation programs. Ortho imagery provides an effective, intuitive means of communication about farm program administration between FSA and stakeholders.

This data set contains 13 categories of land use data (polygons) for Rockingham County, New Hampshire. The primary data used to derive the layer were 1962 1:18,000-scale, black & white, digital orthophotos and 1974 land use data.

Governmental public health departments are responsible for creating and maintaining conditions that keep people healthy. A local health department may be locally governed, part of a region or district, be an office or an administrative unit of the state health department, or a hybrid of these. Furthermore, each community has a unique "public health system" comprising individuals and public and private entities that are engaged in activities that affect the public's health. (Excerpted from the Operational Definition of a functional local health department, National Association of County and City Health Officials, November 2005) Please reference http://www.naccho.org/topics/infrastructure/accreditation/upload/OperationalDefinitionBrochure-2.pdf for more information. Facilities involved in direct patient care are intended to be excluded from this dataset; however, some of the entities represented in this dataset serve as both administrative and clinical locations. This dataset only includes the headquarters of Public Health Departments, not their satellite offices. Some health departments encompass multiple counties; therefore, not every county will be represented by an individual record. Also, some areas will appear to have over representation depending on the structure of the health departments in that particular region. Visiting nurses are represented in this dataset if they are contracted through the local government to fulfill the duties and responsibilities of the local health organization. Effort was made by TechniGraphics to verify whether or not each health department tracks statistics on communicable diseases.

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.

Trails data compiled by NH Office of Strategic Initiatives and NH Fish and Game Department from multiple public information sources including online maps and spatial data, orthophotos, and field data collection with handheld GPS units. Positional accuracy will vary. Coverage and attributes should not be construed as complete.

The New Hampshire Congressional District Boundaries, 2012, contains the US district boundaries generated based on the 2010 US Census population count. Boundaries were derived by applying district codes retrieved from the NH Secretary of State web site to the geometry provided by the GRANIT town boundary layer (PBNH).

SSURGO depicts information about the kinds and distribution of soils on the landscape. The soil map and data used in the SSURGO product were prepared by soil scientists as part of the National Cooperative Soil Survey.The dataset was downloaded on 1/26/2021 from the NRCS GeoSpatial Data Gateway (https://gdg.sc.egov.usda.gov/GDGOrder.aspx) and processed by NH GRANIT staff at the UNH Earth Systems Research Center to:1) Project to NH State Plane feet, NAD832) Clip to the NH state boundary3) Attach key soil attributes from the collection of related tables distributed by NRCS (see SSURGO_Metadata_-_Table_Column_Descriptions.pdf for descriptions)4) Add and populate the "acres" fieldThe remainder of this metadata record is as provided with the downloaded source data, with the exception of the addition of several theme keywords and updating the Spatial Reference Information to reflect the processing described above.

Tidal marshes are susceptible to climate change, especially sea level rise (SLR). Changes in tidal marsh area and habitat type may be modeled using the Sea Level Affecting Marshes Model (SLAMM). The model simulates the dominant processes involved in wetland conversion and shoreline modification under different scenarios of sea level rise. In 2014 the NH Fish and Game Department and the Great Bay National Estuarine Research Reserve, completed a first run of SLAMM. In 2022 that model was improved with higher resolution habitat, LiDAR, and updated parameters. The goal is to guide conservation strategies that will protect the coastal wetland areas that are likely to provide high quality habitat and persist for the longest duration.

This data set represents smoothed, 2-foot bare earth contours (isolines) for the Great Bay Drainages (0106000309) HUC 10 unit. It was derived from a data set which was compiled from LIDAR collections in NH available as of spring, 2019. The raster was filtered using the ArcGIS FOCAL STATISTICS tool with a 3x3 circular neighborhood. The contours were generated using the ArcGIS CONTOUR tool while applying a Z factor of 3.2808 to convert the elevation values from meters to feet. The filtered contours were then smoothed using the ArcGIS SMOOTH LINE tool. The data include an INDEX field with values of 10 and 100 to flag 10 and 100-foot contours. Note on HUC 01060000310: Due to limitations in the source LIDAR data, some anomalies exist in the generated contours in coastal areas of the state. These were left in the data so that users can determine what further processing best meets their application needs.

The New Hampshire County Boundaries layer provides a digital representation of New Hampshire's county boundaries. It was derived from the 1:24,000-scale USGS Digital Line Graphs (DLGs).

These data were extracted from the High Resolution National Hydrography Dataset Plus (NHDPlus HR), an integrated set of geospatial data layers, including the National Hydrography Dataset (NHD), National Watershed Boundary Dataset (WBD), and 3D Elevation Program Digital Elevation Model (3DEP DEM). The NHDPlus HR combines the NHD, 3DEP DEMs, and WBD to a data suite that includes the NHD stream network with linear referencing functionality, the WBD hydrologic units, elevation-derived catchment areas for each stream segment, "value added attributes" (VAAs), and other features that enhance hydrologic data analysis and routing.

The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all. This dataset represents NHD as published by USGS on 4/27/2019.