This is a connection to the Dauphin County GIS Data Portal. The following categories are available: Boundaries Election Hydrology Tax Assessment Transportation Elevation

The following Applications are available: Mobile Parcel Viewer - provides the general public and other interested parties access to searchable and interactive information such as property tax and assessment information or the locations of water access points.

MDJ (Magisterial District Judges) Locator - Identifies Magisterial District Judge and Municipality

Dauphin County Homicides - Application showing Dauphin County homicides in 2015 and 2016

Parcel Viewer - Search for a Parcel, Property Information, Tax Assessment, Municipality, Assessed Land or Building Value, Acres, etc.

Digital Data is distributed as a countywide dataset in ESRI shapefile format. Aerial imagery is available as a countywide dataset either through Dauphin County GIS or downloaded from PA Spatial Data Access (PASDA also available on the Commonwealth Open Data portal)

Geospatial data about Dauphin County, Pennsylvania Parcels. Export to CAD, GIS, PDF, CSV and access via API.

Dauphin County Zoning layer created using municipality zoning maps. Zoning codes vary by municipality, thus the organization of zoning into a unified code provides a clear structure for comparison and analysis of density and land uses.

Geospatial data about Dauphin County, Pennsylvania Streets. Export to CAD, GIS, PDF, CSV and access via API.

Polling place locations. Locations were initially collected in 2006 using a GPS unit based on information provided by Dauphin County Elections and Voter Registration. The dataset is updated as needed using aerial imagery, streets and address point data.

Reference dataset showing the political boundaries of the municipal subdivisions in Dauphin County. Most likely derived from a PennDOT dataset in the early 1990s and updated as needed with the concurrence of the impacted municipalities.

This feature class was compiled using several datasets that had been previously been maintained by the Dauphin County Emergency Management Agency (EMA) and referencing 2003 PAMAP aerial photography. The existing datasets were combined into a single dataset which was then updated to include all the buildings 100 sq ft or larger that were visible on the aerial imagery. The featue class is edited on a case-by-case basis, based on the collection of new building information submitted by EMA or Dauphin County IT or through examination of updated aerial imagery.

A table of alternate street names to be used with the Dauphin County street data.

Streams in Dauphin County, PA

The Pennsylvania Flood Risk Tool is an interactive web map application developed by Penn State University with funding from the Federal Emergency Management Agency (FEMA). This application depicts 1% annual chance floodplain boundaries in an online map environment. https://pafloodrisk.psu.edu/home/index.html

The Dauphin County, PA 2016 QL2 LiDAR project called for the planning, acquisition, processing and derivative products of LIDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LIDAR Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83 (2011) State Plane Pennsylvania South Zone, US survey feet; NAVD1988 (Geoid 12B), US survey feet. LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.4 Files formatted to 711 individual 5,000-foot x 5,000-foot tiles. Tile names use the following naming schema: "YYYYXXXXPAd" where YYYY is the first 3 characters of the tile's upper left corner Y-coordinate, XXXX - the first 4 characters of the tile's upper left corner X-coordinate, PA = Pennsylvania, and d = 'N' for North or 'S' for South. Corresponding 2.5-foot gridded hydro-flattened bare earth raster tiled DEM files and intensity image files were created using the same 5,000-foot x 5,000-foot schema. Hydro-flattened breaklines were produced in Esri file geodatabase format. Continuous 2-foot contours were produced in Esri file geodatabase format. Ground Conditions: LiDAR collection began in Spring 2016, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications, Quantum Spatial established a total of 84 control points (24 calibration control points and 60 QC checkpoints). These were used to calibrate the LIDAR to known ground locations established throughout the project area.

The National Pipeline Mapping System (NPMS) Public Viewer enables the user to view NPMS pipeline, liquefied natural gas (LNG) plant and breakout tank data one county at a time, including attributes and pipeline operator contact information. The user can also view gas transmission and hazardous liquid pipeline accidents and incidents going back to 2002 for the entire US. NPMS pipeline data consists of gas transmission pipelines and hazardous liquid pipelines jurisdictional to the Pipeline and Hazardous Materials Safety Administration (PHMSA). It does not contain gas gathering or distribution pipelines, such as lines which deliver gas to a customer 's home. Therefore, not all pipelines in an area will be visible in the Public Viewer. As well, the breakout tank data is not complete as submission of that data is not a requirement. All NPMS data is for reference purposes only. It should never be used as a substitute for contacting a one-call center prior to excavation activities. Please call 811 before any digging occurs.

This layer was created as part of a Flood Inundation Map Library developed for display within the NOAA National Weather Service's Advanced Hydrologic Prediction Services (AHPS), the SRBC Susquehanna Inundation Map Viewer (SIMV), and the USGS Flood Inundation Mapper (FIM). This data represents the potential flood extent for a stage of 11-ft to 37-ft as recorded at the Harrisburg (Susquehanna River at Harrisburg, PA; USGS ID 01570500) river gage. This data is part of a series of inundation layers meant to correlate observations and forecasts from the river gage with a visual representation of the areas impacted by high water. The data set of flood inundation areas was created from flood scenarios generated by HEC-RAS runs provided by USACE-Baltimore and LiDAR data from PASDA processed to extract bare earth points. A shapefile of inundation area for each stage was created and subsequently merged to form continuous datasets for the main-stem Susquehanna River and backwater areas on its tributaries.This data was developed to assist the public and emergency officials with planning and response to high water episodes at or near a defined National Weather Service river forecast point.