Map of the Day: Influenza Vaccine Inventory by Health District

…from the ESRI Map Book Volume 1: GIS in State Government

Nebraska Health and Human Services System

“The state of Nebraska conducts annual surveys of influenza activity in the state. There are multiple tools in place to collect and report data about health status related to influenza activity.

“During the current vaccine shortage and the shortage that occurred last year, the state of Nebraska used the Health Alert Network to communicate with providers and public health departments. Various automated surveys, fax surveys, and phone calls helped determine vaccine supply, antiviral supply, and vaccine need across the state. Many of these data sources were integrated into GIS and printed as maps for public health communication purposes and for data analysis by public health professionals.

“The map shows the number of doses of flu vaccine interpolated by the population by health district. The product is the number of doses per resident.”

Map of the Day: Contaminated Sites, City of Houston

…from the ESRI Map Book, Volume 24


“The City of Houston needed to locate all contaminated sites within its municipal boundary. Several agencies at the federal, state, and municipal levels tracked these locations, but there was no single source to show the entire universe of contaminated sites in the Houston area across all the programs. A comprehensive geodatabase would enable the city to analyze concentrations of these sites and prioritize locations to remediate.

“Aggregating and analyzing these contaminated sites based on ZIP Codes, neighborhoods, council districts, and other boundaries gave policy makers vital data to better serve citizens. Houston’s office of the mayor compiled the information from various environmental agencies and turned it over to the Planning Department’s GIS mapping team. The mapping team took the data, which was broken down by participating program, and geocoded the addresses. Afterward, the feature classes were organized into a geodatabase by program affiliation and the concentrations of these sites were analyzed based on various regional boundaries. The final presentation map set summarizes the findings of the study, highlighting the concentrations of these contamination program sites based on known Houston geographical areas.

“Courtesy of City of Houston Department of Planning and Development.”

Map of the Day: Development of an Erosion-Reduction Management Strategy for Watersheds and Reservoirs in Algeria

…from the ESRI Map Book, Volume 24


“In Algeria, water is a key component of economic development, and its scarcity necessitates dams for storage and distribution for irrigation and human consumption. The Agence Nationale des Barrages et Transferts (ANBT) plans to build new dams to bring the total to 70 by 2010. However, soil erosion has contributed to a 20 percent reduction in reservoir capacities since their construction.

“In 2003, the ANBT invited Tecsult Inc., a major Canadian engineering firm, to conduct a comprehensive study that would locate the degraded areas of watersheds of twenty-one dams (five existing and sixteen in the detailed planned stage) and to develop watershed management plans to reduce hillside erosion and decrease reservoir siltation (accumulation of silt). The total study area covered more than 23,800 square kilometers (9,190 square miles), and the allowed study time was eighteen months.

“Each watershed was characterized for three types of erosion (sheet erosion, gully erosion, and landslides), and the resulting maps were combined in order to create a consolidated erosion risk map. Using this map and twelve land management measures, a watershed management plan was developed for each dam. Each watershed has also a map locating four kinds of special erosion control actions that aimed to reduce the stream sediment loads before they reach the reservoir. Finally, the budget required for implementing the watershed management plan with the special erosion control actions was estimated for each watershed. It was estimated that the twenty-one management schemes elaborated during this study will yield a total estimated gain of water in their reservoir equivalent to the consumption of water for more than 9 million people in one year.

“Courtesy of Agence Nationale des Barrages et Transferts (ANBT).”

Map of the Day: Cabonga Reservoir, Canada

…from the ESRI Map Book, Volume 24


“This map represents the bathymetry of the Cabonga reservoir, located in the réserve faunique La Vérendrye at the border of Abitibi-Témiscamingue and Outaouais. It was designed to help fishermen and other boating enthusiasts to navigate the waters safely.

“The TRAK survey team collected the data over several weeks. Then data was sorted, processed, and checked by the geomatics department with the help of local partners. In order to make the map more versatile, several service providers around the reservoir are also listed.

“Courtesy of TRAK and Base de données topographiques du Québec.”

Map of the Day: Lake Davis Pike Eradication Project, California

…from the ESRI Map Book, Volume 24


“Global Positioning System tracks on Lake Davis represent how the California Department of Fish and Game applied the chemical rotenone to rid the reservoir of the predatory and invasive northern pike (Esox lucius). Pike have adversely affected the Lake Davis trout fishery and the associated local economy. If pike escape or are moved from the reservoir, they could endanger fish populations in other waters where they become established. For example, pike have the potential to cause irreversible damage in portions of California’s Feather, Sacramento, and San Joaquin river systems; the Sacramento-San Joaquin Delta; as well as many other waters of the state and region.

“Courtesy of California Department of Fish and Game.”

Map of the Day: Surficial Geology of the Tallgrass Prairie National Preserve, Chase County, Kansas

…from the ESRI Map Book, Volume 24


“A better understanding of the geology and water resources of the Tallgrass Prairie National Preserve, located in the Flint Hills physiographic region of Kansas, is critical to long-term management of the preserve’s natural resources. The newly created geologic map, hydrogeologic map, and supporting data provide the National Park Service and The Nature Conservancy (a public-private partnership jointly managing the preserve) with benchmark information about the preserve’s geology and natural resources. Because the preserve’s land-use patterns—including burning regimes, grazing, and human visitation—are changing, it is important to have baseline geologic and hydrogeologic data. The knowledge gained at the preserve will be useful to resource managers, researchers, and others at the preserve and throughout the Flint Hills region.

“This surficial geology map shows the distribution, rock type, and age of bedrock near the earth’s surface. It can be used to identify surface and subsurface lithologic units and their stratigraphic relationships, show geologic structures, delineate thick surficial materials such as alluvium, and show the spatial orientation of these features. The geologic map will be useful in construction and engineering projects, in understanding ground-water characteristics, and for environmental assessments. Understanding the near-surface geology and incorporating geologic evaluations into the planning process can help prevent future construction, resource, and environmental problems.

“Courtesy of Kansas Geological Survey.”

Map of the Day: Arizona’s Natural Infrastructure

…from the ESRI Map Book, Volume 24

conservation1_sm“Arizona’s natural infrastructure includes lands and waters that preserve the state’s natural heritage and open space. The Nature Conservancy developed a natural infrastructure dataset by integrating twelve regional studies on wildlife habitat and open space and used the dataset to understand the potential impacts of Arizona’s future growth by 2050.

“Results show that although Arizona’s population is projected to double by 2050, its associated urban footprint may quadruple. If growth follows current projections, Arizona could lose nearly two million acres of natural infrastructure by 2050. This loss of desert, grassland, and forest habitat could jeopardize at least 120 species.

“However, there are 2.7 million acres of undeveloped private and state lands outside of the natural infrastructure and within 30 miles of existing highways. Shifting projected development into these areas would minimize direct impacts to the natural infrastructure.

“Courtesy of The Nature Conservancy.”

Map of the Day: Conservation Action in Melanesia

…from the ESRI Map Book, Volume 24


“Papua New Guinea and the Solomon Islands are home to magnificent forests and coral reefs. This map highlights the rich habitats with a focus on current conservation action. Marine areas and terrestrial conservation areas are managed by the local people and government with support from The Nature Conservancy. The map also illustrates the multiple scales that The Nature Conservancy works in, from empowering local villages to coordinating across the region with the Coral Triangle.

“Courtesy of Nate Peterson and the Melanesia Team, The Nature Conservancy.”

Map of the Day: Automated Scar Extraction and Kernal Density Analysis

…from the ESRI Map Book, Volume 24


“Seagrass beds are an important nursery habitat for many fish and shrimp species in Texas’ coastal waters. Boaters often cause damage in these shallow areas by scarring seagrass beds with their propellers, leaving long “scars” or bare areas.

“Due to the sensitive nature of this precious resource, the Texas Parks and Wildlife Department (TPWD) monitors seagrass health carefully. In 2005, the Texas Parks and Wildlife Commission passed a law prohibiting the uprooting of seagrass in Redfish Bay, and TPWD Coastal Fisheries staff began an intensive study of seagrass scarring trends. To observe scarring behavior, TPWD acquired high-resolution imagery (0.1m) in 2007 intending to make comparisons with imagery in 2008 and 2009.

“This map represents phase 1 of the assessment in which automated feature detection software was employed to quickly identify scarred areas. A data mining tool was then used to remove commission errors from the Feature Analyst output. (This methodology was developed by Kass Green, Mark Tukman, and Mark Finkbeiner in the 2008 Redfish Bay Texas Airborne Sensor Comparison and Propeller Scar Mapping Final Report.) Parameters were changed to suit the needs of this project.

“Using the ArcGIS Spatial Analyst extension, kernal densities were created from the centroids of the scar polygons. The resulting map identifies areas of high-, moderate-, and low-scarring intensities.

“Courtesy of Texas Parks and Wildlife Department.”

Map of the Day: Neotropical Biodiversity Protected Areas

…from the ESRI Map Book, Volume 24


“This map of neotropical protected areas, including indigenous areas, was prepared for the Latin American Congress of National Parks and Other Protected Areas, held in Bariloche, Argentina, September 30 to October 6, 2007.

“Data for the protected and indigenous areas came largely from the United Nations Environment Programme—World Conservation Monitoring Centre’s World Database of Protected Areas, with significant additions from sources in Conservation International. Elevation data is from the National Aeronautics and Space Administration’s Shuttle Radar Topography Mission. Drainage and political boundaries are from ESRI.

“Information on the map is presented in Spanish, Portuguese, and English, as was appropriate for this important international conference. The large-format (36 × 34-inch) map shows the neotropical protected areas of the western hemisphere at a scale of 1:9,700,000, and uses an equal area azimuthal projection centered on 77°W longitude and 5°S latitude. The key map, at a scale of 1:100,000,000, is in the same azimuthal projection.

“Courtesy of Conservation International.”