Map of the Day: Analysis of Susceptibility for Threat (Removal) in Mass in the Locality of Santa Fe, Bogotá

…from the ESRI Map Book, Volume 24


“This map shows the risk for mass removal and the susceptibility level for trees. It contains city blocks and shadow relief created on the Bogotá digital elevation model (DEM). Mass removal occurs when large quantities of ground slide and shift after earthquakes, tremors, or heavy rains. Mass removal seriously damages urban infrastructures and, in many cases, threatens human life.

“The map indicates trees located in zones of risk for mass removal as well as the relief of the zone. The map is a valuable tool for the entities responsible for preventing and responding to mass removal. It shows the places where they have to intervene.

“Courtesy of Jardín Botánico José Celestino Mutis.”

Map of the Day: For the Love of the Lake, Historic Lakeshore Communities

…from the ESRI Map Book, Volume 24


“This map is part of a series of community maps of the town of Georgina produced by residents. Its purpose is to showcase what residents think is important about their neighborhoods and to help protect and enhance what is special. The map points out a nature reserve and a local stream, both important habitats for conservation.

“The Deer Park Road area is an important mature mixed forest providing habitat for a wide range of animals, birds, and amphibians. Private landowners in the area worked together with the Lake Simcoe Region Conservation Authority to create the Arnold C. Matthews Nature Reserve in order to preserve and steward the land in perpetuity.

“Boyer’s Stream connects protected core lands and Lake Simcoe, providing habitat for waterfowl, amphibians, and marsh birds and a potential upstream fish spawning route.

“Courtesy of the Alliance for a Better Georgina.”

Map of the Day: Local Tree Plan, Chapinero, Bogotá

…from the ESRI Map Book, Volume 24


“This map analyzes biological corridors (linear strips of vegetation that provide a continuous or near-continuous pathway between habitats) and tree crowns (the area above the trunk) in the locality of Chapinero, Bogotá. It shows the trees modeled with an equatorial diameter buffer and integrated with a dissolve for biological research. The trees with their crowns close together serve as a biological corridor for local birds and insects. They also provide shade for people living in the city.

“Courtesy of Jardín Botánico José Celestino Mutis.”

Map of the Day: Human Use and Management Chart, North Coast Section of Oregon

…from the ESRI Map Book, Volume 24


“The State of Oregon and Oregon’s Ocean Policy Advisory Council (OPAC) need geospatial information for the coastal and offshore areas of Oregon for planning. This map is one in a reference chart series showing human use and management. Generated initially to support the Oregon marine reserve proposal process, these maps were part of a larger effort that also mapped biological resources and seafloor and shoreline.

“The sea has traditionally been familiar territory to the fishing community. Other interests such as potential wave energy projects and marine conservation have emerged. The maps help OPAC members and others understand current and potential use of specific areas. The maps are used to facilitate planning, state and local discussions, and education efforts.

“Courtesy of Andy Lanier and Barbara Seekins.”

Map of the Day: Myanmar (Burma) Cropland Recovery and Severity Analysis of Tropical Storm Nargis—2008

…from the ESRI Map Book, Volume 24


“Tropical cyclone Nargis struck the heart of Burma’s rice growing region in the low-lying Ayeyarwady Delta on May 2, 2008, causing extensive damage to agricultural lands, infrastructure, livestock, and stored food grains. A nearly 2,000-square-mile area of prime farmland was inundated with salt water and/or heavy rainfall. The affected region normally accounts for roughly 60 percent of the nation’s rice production.

“The U.S. Department of Agriculture (USDA) had conducted a post-flood assessment that indicated that as of May 30, 2008, flood waters receded over a sizable area (300,000 hectares total recovery; 490,000 hectares improved since May 5, 2008). However, a month after the cyclone, approximately 1.40 million hectares, or 80 percent of the original inundated area, were still affected by some degree of flooding. Approximately 870,000 hectares had shown no improvement. The areas that showed the greatest change in the severity of flooding were the coastal areas of southern Ayeyarwady division. Natural drainage in these coastal rice farming areas must have aided the recovery, as further inland crop areas did not show the same degree of improvement. In contrast, much of the southern regions of Yangon division, which were heavily inundated, did not show much improvement a month after the cyclone’s passing.

“The Foreign Agricultural Service of the USDA works to improve foreign market access for U.S. products, build new markets, improve the competitive position of U.S. agriculture in the global marketplace, and provide food aid and technical assistance to foreign countries.

“Courtesy of U.S. Department of Agriculture, Foreign Agricultural Service.”

Map of the Day: Shaded Drift-Thickness Map of Ohio

…from the ESRI Map Book, Volume 24


“The drift-thickness map of Ohio depicts the thickness and distribution of glacially derived sediments (called drift) and post-glacial stream sediments overlying the buried bedrock surface. This map was produced by subtracting bedrock-surface elevations from land-surface elevations to produce a residual map of drift thickness. Colors portray thickness intervals of glacial and modern sediments, which can range up to several hundred feet.

“The bedrock-surface component is one of the products resulting from a multiyear effort by the Ohio Department of Natural Resources, Division of Geological Survey, to map the bedrock geology of Ohio. Bedrock-topography maps are required to determine the relief on the bedrock surface beneath thick layers of glacial drift. These maps were created for all 788 7½-minute topographic quadrangles in the state as part of a process to produce accurate bedrock-geology maps for glaciated portions of Ohio and for those areas beyond the glacial boundary where valleys are infilled with sediment. Data concentration and contour intervals on the original, hand-drawn bedrock-topography maps vary widely across the state in response to changing geologic and topographic conditions. During the course of mapping, over 162,000 data points were interpreted for bedrock-surface elevation and in some cases drift thickness. These points were plotted on maps and used as control for the bedrock-topography lines.

“Courtesy of Donovan Powers, Ohio Department of Natural Resources, Division of Geological Survey.”

Map of the Day: Vegetation in the Vicinity of the Toolik Field Station, Alaska

…from the ESRI Map Book, Volume 24


“These vegetation maps are shown at three scales in the vicinity of the Toolik Field Station, Alaska, which is an Arctic research facility run by the Institute of Arctic Biology at the University of Alaska, Fairbanks. The maps are intended to support research at the field station.

“The front side of the map sheet contains a vegetation map and ancillary maps of a 751-square-kilometer (290-square-mile) region surrounding the upper Kuparuk River watershed, including the Toolik Lake and the Imnavait Creek research areas, as well as portions of the Dalton Highway and Trans-Alaska Pipeline from the northern end of Galbraith Lake to Slope Mountain. The reverse side shows detailed vegetation maps of the 20-square-kilometer (7.7-square-mile) research area centered on Toolik Lake and a 1.2-square-kilometer (1/2-square-mile) intensive research grid on the south side of Toolik Lake. All the maps are part of a hierarchical geographic information system and the Web-based Arctic Geobotanical Atlas.

“Courtesy of Alaska Geobotany Center, Institute of Arctic Biology, University of Alaska, Fairbanks.”