Filters: Tags: central america (X)
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The Digital Chart of the World (DCW) is an Environmental Systems Research Institute, Inc. (ESRI) product originally developed for the US Defense Mapping Agency (DMA) using DMA data. The DCW 1993 version at 1:1,000,000 scale was used. The DMA data sources are aeronautical charts, which emphasize landmarks important from flying altitudes. This explains why there is a separate aeronautical theme with all conceivable airports, yet why on some themes small islands and lakes are simply unnamed points. ESRI, in compiling the DCW, also eliminated some detail and made some assumptions for handling tiny polygons and edgematching. Also, note that the completeness of the thematic categories present in each layer will vary....
This dataset depicts rivers in the Mesoamerican region, gathered from a variety of moderate resolution sources.
Tags: central america,
rivers
The Digital Chart of the World (DCW) is an Environmental Systems Research Institute, Inc. (ESRI) product originally developed for the US Defense Mapping Agency (DMA) using DMA data. The DCW 1993 version at 1:1,000,000 scale was used. The DMA data sources are aeronautical charts, which emphasize landmarks important from flying altitudes. This explains why there is a separate aeronautical theme with all conceivable airports, yet why on some themes small islands and lakes are simply unnamed points. ESRI, in compiling the DCW, also eliminated some detail and made some assumptions for handling tiny polygons and edgematching. Also, note that the completeness of the thematic categories present in each layer will vary....
South America: This dataset represents Ecological System patches using various reference datasets. Original data generarated from 2000 era data, modeled in 2005 and updated in 2008 and 2010.Originally, this project developed a GIS modeling approach, using a variety of abiotic and biotic data sets, to produce a map of the distribution of Latin America and Caribbean (LAC) ecological systems throughout South America for use in ecoregional assessments. Ecological systems, defined as spatially co-occuring assemblages of vegetation types sharing a common underlying substrate, ecological process, or gradient, were identified for all of LAC in a recent classification effort by NatureServe (Josse et. al., 2003), but the...
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