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Tools

Gap Data Display and Analysis Tools: 

Gap Ecosystem Data Exploroer (GEDE) Tool - The GEDE Tool is a customized ArcView (ver. 3.2) project that displays and manipulates GAP data through a series of dialog boxes and avenue scripts. The GEDE Tool allows non-GIS savvy users to quickly view data and conduct advanced queries with a few simple clicks. While the GEDE Tool has been designed to be accessible to a broad audience, it is based on a full implementation of ArcView with Spatial Analyst, and thereby, provides an advanced GIS platform for those who wish to expand the complexity of their queries and analyses. Learn more by viewing Steve William's powerpoint presentation.

Kansas Gap Analysis Arcview Interface: The interface was developed as a way to provide easy access to Kansas GAP species, land cover, and stewardship data for display and manipulation. The data is in the original 30 m resolution, which takes a large amount of disc space, but allows the user to see detailed species habitat maps corresponding to the land cover. For more information about this application, contact Todd Hoernemann or Jack Cully.

Landscape Analyst: The Landscape Analyst is an ArcView GIS (version 3.x) extension. It allows users to assess the current conditions of watersheds, counties and/or regions both visually and quantitatively. It also allows users to simulate potential impacts of future changes to the landscape. The Landscape Analyst simplifies and organizes GIS functions into an interface that can be used by intermediate ArcView GIS users to make policy decisions regarding the Earth's landscape. The Landscape Analyst can be downloaded at the following web address: http://canaanvi.org/gis/landscapeanalyst.asp. Learn more by viewing Jacquelyn Strager's powerpoint presentation.

Ecosystem Management Decision Support System (EDMS): The Ecosystem Management Decision Support (EMDS) system is an application framework for knowledge-based decision support of ecological assessments at any geographic scale. The system integrates state-of-the-art geographic information system (GIS) as well as knowledge-based reasoning and decision modeling technologies in the Microsoft Windows® (hereafter, Windows) environment to provide decision support for a substantial portion of the adaptive management process of ecosystem management.

Sites: An Analytical Toolbox for Ecoregional Conservation Planning: Sites 1.0 is a customized ArcView project that facilitates designing and analyzing alternative portfolios. The software in Sites 1.0 to select regionally representative systems of nature reserves for the conservation of biodiversity is called the Site Selection Module (SSM). It is a streamlined derivative of SPEXAN 3.0 (Spatially Explicit Annealing) that was developed by Ian Ball and Hugh Possingham. SPEXAN was originally developed as a stand-alone program with no GIS interface for displaying portfolios and ancillary spatial data. The model was applied in two TNC ecoregions--the Idaho Batholith and the Northern Sierra Nevada. This web site contains the Sites 1.0 software, example data sets, and a slide show demonstrating the modeling process.

Animal Movement Analysis - A USGS ArcView tool for analyzing animal movement.

Refuge GAP The decision support tool is designed to mirror the U.S. Fish and Wildlife Service's Land Acquisition Priority System for significant community biodiversity targets. This is a four-step process which prompts the user to assign ranks of importance to variables such as significance to biodiversity protection, degree of alteration, management considerations (land use) and species of concern. The user is taken through a series of menus which display data available for input variables and prompts for the input of weights to each of the variables. Once all the variables have been weighted, they are combined in a GIS analytical process, the result of which is a map color-coded to depict areas which meet the specified criteria for land acquisition.

Automated Geospatial Watershed Assessment (AGWA) - AGWA is a GIS-based hydrologic modeling tool. AGWA is packaged as an extension for ArcView 3.x and is available for free download. 

Planning and assessment in land and water resource management are evolving from simple, local-scale problems toward complex, spatially explicit regional ones. Such problems have to be addressed with distributed models that can compute runoff and erosion at different spatial and temporal scales.

The USDA-ARS Southwest Watershed Research Center, in cooperation with the U.S. EPA Office of Research and Development, has developed a GIS tool to facilitate this process. A geographic information system (GIS) provides the framework within which spatially-distributed data are collected and used to prepare model input files and evaluate model results.

General

Handbook - A Handbook for Conducting Gap Analysis

Links - Links of use or interest to Gap Analysis

MegaMerge

Land Cover Mapping - A description of all available state mapping procedures

Search - Search the whole GAP Web Site

Scripts Archive - An archive of scripts submitted by GIS analysts working on GAP projects

EMAP Hexagon - This downloadable EMAP hexagon grid consists of a tessellation of hexagons that cover the conterminous United States.

GAP Program 5 part powerpoint slide show - A  slide show that explains Gap Analysis (11 mb)

Fonts - Click here to download fonts you need to print or view pdf files correctly.

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Tracking Survey

Logo - The official National Gap Analysis logo; please use it on any official publications