Select Base Map

The Select Base Map toolbar allows the user to choose the base layer for the AUL map.   To choose a base layer, click the radio button in front of the layer name.   The selected layer will be displayed as the base map.   The default layer is the ESRI Streets & Imagery layers.

·         ESRI Streets & Imagerys

§  Streets:   This worldwide street map presents highway-level data for the world and street-level data for the United States, Canada, Japan, Southern Africa, most countries in Europe, and several other countries. This comprehensive street map includes highways, major roads, minor roads, one-way arrow indicators, railways, water features, administrative boundaries, cities, parks, and landmarks, overlaid on shaded relief imagery for added context. The map also includes building footprints for selected areas in the United States and Europe and parcel boundaries for much of the lower 48 states.

§  The street map was developed by Esri using Esri basemap data, DeLorme basemap layers, Automotive Navigation Data (AND) road data, U.S. Geological Survey (USGS) elevation data, UNEP-WCMC parks and protected areas for the world, Tele Atlas Dynamap® and Multinet® street data for North America and Europe, and First American (CoreLogic) parcel data for the United States. Coverage for street-level data in Europe includes Andorra, Austria, Belgium, Czech Republic, Denmark, France, Germany, Great Britain, Greece, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, San Marino, Slovakia, Spain, Sweden, and Switzerland. Coverage for street-level data elsewhere in the world includes China (Hong Kong only), Colombia, Egypt (Cairo only), Indonesia (Jakarta only), Japan, Mexico, Russia, South Africa, Thailand, and Turkey (Istanbul and Ankara only).

 

·          National Geographic:  This Internet-based map service combines a century-old cartographic tradition with GIS technology.   Created by the National Geographic Society in cooperation with Esri, it provides a basemap for users who want to display minimal data against a vibrant, detailed background.

This reference map includes physical and natural features, administrative boundaries, cities, transportation infrastructure, landmarks, protected areas, ocean floors, and other layers. Shaded relief and land-cover imagery supply added context. Global coverage is available to 1:144,000 scale, and more detailed coverage, down to 1:9,000, is available in urban areas in North America. The map uses data from a variety of leading data providers including DeLorme, NAVTEQ, UNEP-WCMC, NASA, ESA, and USGS.

·         Topo:   This map was compiled to uniform cartography using a variety of best available sources from several data providers, including the U.S. Geological Survey, U.S. Environmental Protection Agency, U.S. National Park Service, Food and Agriculture Organization of the United Nations (FAO), Department of Natural Resources Canada (NRCAN), Agriculture and Agri-Food Canada, the State of Arkansas, Tele Atlas, Automotive Navigation Data (AND), DeLorme, and ESRI.

The service currently provides coverage for the world down to a scale of ~1:144k, coverage for the continental United States and Hawaii from a scale of ~1:9.2m down to ~1:18k, coverage for Arkansas from a scale of ~1:577k down to ~1:4.5k, coverage for Canada and Western Europe from a scale of ~1:72k down to ~1:18k, coverage for selected cities in Western Europe down to ~1:5k, and coverage for Hong Kong and Macau from a scale of ~1:72,000 down to ~1:1,000.

If the ESRI Street and Imagery Layer is selected, a slider will be visible to adjust the transparency of the layers.

The closer the slider is to the layer name, the less transparent the layer will appear.   The farther away the slider is from the layer name, more transparent the layer will become. See examples below