• GIS Data - Data and Tools

    Domestic wells provide drinking water supply for approximately 40 million people in the United States. Knowing the location of these wells, and the populations they serve, is important for identifying heavily used aquifers, locations susceptible to contamination, and populations potentially impacted by poor-quality groundwater.

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  • Geographic Information Systems (GIS) Mapping Tools

    Geographic Information Systems (GIS) Mapping Tools Open Data Portal. PA DEPGIS open data portal provides access to all of our publicly published, non-sensitive GIS data, which includes over 300 data layers relative to abandoned mine lands, air quality, water pollution control, coal mining, hazardous waste, operations, oil gas, streams and lakes, industrial minerals mining, integrated

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  • EPA Geospatial Applications | US EPA

    Sep 18, 2020 · This website provides access to outdoor air quality data collected from state, local and tribal monitoring agencies across the United States. AirNow - AirNow provides current, historical and forecast air quality maps and data for more than 500 cities across the U.S., Canada and Mexico using the Air Quality Index (AQI), a color-coded index

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  • (PDF) Water quality management using GIS and RS tools

    geographical information systems measurement. Water quality restoration programs can utilize RS and GIS TMDL program is a well known water quality restoration program of United States .

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  • Wind Resource Data, Tools, and Maps | Geospatial Data - NREL

    Wind Resource MapsWind Resource Geospatial DataCite The Maps and DataThese static maps illustrate multiyear average wind speeds at various heights derived from NRELWIND Toolkit. They may be used in electronic and printed publications with proper citation. Note: The publication dates listed below don't necessarily reflect the publication dates of the data therein.

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  • USGS Water Resources: About USGS Water Resources

    Some areas, notably major cities in the west, were recompiled at a scale of 1:100K. The coverage was compiled to provide the National Water Quality Assessment (NAWQA) study units with an intermediate- scale river basin boundary for extracting other GIS data layers. The coverage is available on line, at no charge, via links from the file.

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  • GIS Data Center - Mecklenburg County Government

    Mecklenburg County GIS hosts an Open Data Portal called Open Mapping in which the public can browse for and download GIS Mapping layers called shapefiles (zipped) for personal use. Please note: Shapefiles are comprised of multiple files. The DBF file of a shapefile can be loaded into excel and viewed if map data viewing capabilities are not needed.

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  • Water Quality | USGS.gov

    pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. The pH of water is a very important measurement concerning water quality.

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  • Access GIS Data Viewer | Guilford County, NC

    GIS site updates; 5/1/20 – Completed the installation of our Enterprise Architecture.. 6/6/2019 – Added 2018 Orthoimagery to the site. Please click here for more information.

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  • GIS Mapping Applications - Yavapai County, Arizona

    11x11 inches, February 2020. For help with any of these Mapping Applications, please visit the GIS Mapping Application FAQ’s page. Contact Us: Email us at [email protected] or call weekdays 8 am to 5 pm except holidays at 928-771-3169 (in Prescott).

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  • Accuracy and precision - GIS Wiki | The GIS Encyclopedia

    Accuracy Versus Precision; The Target AnalogyQuantifying Accuracy and PrecisionAccuracy and Precision in Binary ClassificationAccuracy and Precision in Psychometrics and PsychophysicsAccuracy and Precision in Information SystemsSee AlsoReferencesExternal LinksAccuracy is the degree of veracity while precision is the degree of reproducibility.[citation needed]The analogy used here to explain the difference between accuracy and precision is the target comparison. In this analogy, repeated measurements are compared to arrows that are shot at a target. Accuracy describes the closeness of arrows to the bullseye at the target center. Arrows that strike closer to the bullseye are considered more accurate. The closer a systemmeasurements to the accepted value, the more accurate the system is considered to be. To continue the analogy, if a large number of arrows are shot, precision would be the size of the arrow cluster. (When only one arrow is shot, precision is the size of the cluster one wouldexpect if this were repeated many times under the same conditions.) When all arrows are grouped tightly together, the cluster is considered precise since they all struck close to the same spot, if not necessarily near the bullseye. The measurements are...

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  • Lesson 7 - Understanding GIS Error, Accuracy, and Precision

    The mapping standards employed by the United States Geological Survey specify that: "requirements for meeting horizontal accuracy as 90 percent of all measurable points must be within 1/30th of an inch for maps at a scale of 1:20,000 or larger, and 1/50th of an inch for maps at scales smaller than 1:20,000."

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  • King County GIS Center - King County

    Mar 26, 2020 · The King County GIS Center manages the King County Geographic Information System (KCGIS), King County’s cooperative, multi-department, enterprise GIS. We provide efficient, high-quality GIS leadership, coordination, infrastructure, and services to meet the business needs of our customers and clients in King County government, the Puget Sound

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  • GIS (Geographic Information System) | National Geographic Society

    Jun 21, 2017 · A geographic information system (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on Earth’s surface. By relating seemingly unrelated data, GIS can help individuals and organizations better understand spatial patterns and relationships.

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  • Geographic Information System - US Army Environmental Command

    USAEC GIS Support. In addition to the GIS initiatives managed by USAEC, the GIS team supports USAEC and the Army community by providing technical consultation, performing geospatial data analyses, reviewing contract language for GIS-related work, providing training to Project Managers on the principles of GIS, and creating professional cartographic products.

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  • Maps GIS | Snohomish County, WA - Official Website

    Information Technology Administration Building - East 3000 Rockefeller Avenue, M/S 709 Everett, WA 98201 View Map (PDF) (see A) [email protected] Phone: 425-262-2150

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  • USGS Groundwater Data for the Nation

    Measurements are commonly recorded at a fixed interval of 15- to 60-minutes and transmitted to the USGS every hour. Values may include "Approved" (quality-assured data that may be published) and/or more recent "Provisional" data (of unverified accuracy and subject to revision). Most current data are provisional.

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  • Air Data: Air Quality Data Collected at Outdoor - US EPA

    Apr 15, 2021 · This site provides air quality data collected at outdoor monitors across the United States, Puerto Rico, and the U. S. Virgin Islands. Users can download, output, view or visualize the data.

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  • USGS Water Data for the Nation

    The USGS investigates the occurrence, quantity, quality, distribution, and movement of surface and underground waters and disseminates the data to the public, State and local governments, public and private utilities, and other Federal agencies involved with managing our water resources. About Us Help Tutorial

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  • Soil Geography | NRCS Soils

    Soil Colors — Maps that show soil color at various depths for individual States and the Continental United States. • Soil Colors posters for each State Map of the Month — The National Soil Survey Center is now featuring a display called “Map of the Month” to generate awareness about historic soil survey maps.

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  • GIS Mapping Applications | Maricopa County, AZ

    List of all publicly accessible GIS Mapping Applications. FLO-2D WEB ACCESS TOOL. The FLO-2D Web Access Tool allows our client agencies, consulting engineers and the public access to 2D model results from District ADMS(P) projects.

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  • GIS and Maps | AustinTexas.gov

    Property Profile answers questions about specified properties and development regulations within the City. With Property Profile you can search for information, see aerial images including street views, create custom maps, download data, and run a report detailing information about a specified

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  • NYCityMap • DoITT • City-Wide GIS

    Access to Geospatial or location-based information and data is provided to the public through NYCityMap. NYCityMap is targeted towards non-mapping professionals and provides a wealth of geographic-based information from the input of a single location. In addition to indicating the specific building requested, users can select additional layers to add to the map such as schools, day care

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  • GIS Mapping Software, Location Intelligence Spatial

    Esri’s GIS mapping software is the most powerful mapping spatial analytics technology available. Learn how businesses are using location intelligence to gain a competitive advantage.

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  • Interactive Data Maps - Bay Area Air Quality Management District

    Air quality data from the Air District Air Monitoring Network sites shown in the map are available to view online. Pollutants measured include ozone, oxides of nitrogen, carbon monoxide, sulfur dioxide, hydrogen sulfide, particulate matter, hydrocarbons, elemental and organic carbon, and various hazardous air pollutants.

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  • Geo-Spatial Data Resources | cdc.gov

    Nov 19, 2019 · Measures of vital health factors, including high school graduation rates, obesity, smoking, unemployment, access to healthy foods, the quality of air and water, income inequality, and teen births in nearly every county in America.

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  • Home | NHC Maps

    GIS Users If you are an existing GIS user, visit this page for information on how to connect to our data services. Information Technology: 230 Government Center Drive, Suite 155 • Wilmington, NC 28403 • Phone 910-798-7107 • Fax 910-798-7196

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  • TIGER/Line Shapefiles - The United States Census Bureau

    Format: Shapefile - 2007 to Present; TIGER/Line ASCII format - 2006 and earlier; Census 2000 available in both formats; The core TIGER/Line Files and Shapefiles do not include demographic data, but they do contain geographic entity codes (GEOIDs) that can be linked to the Census Bureau’s demographic data, available on data.census.gov.

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  • Solar Irradiance data | Solargis

    Solar irradiance data, online apps and consultancy services that help reduce risks and optimise performance of solar power plants.

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  • NATIONAL GRID CO USA (NE POWER) Lead Analyst, Data Management

    Apply for a NATIONAL GRID CO USA (NE POWER) Lead Analyst, Data Management job in Westford, MA. Apply online instantly. View this and more full-time part-time jobs in Westford, MA on Snagajob. Posting id: 623144928.

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