According to Hipolito Contreras of the Belize Land Information Centre (personal communication 2005), the watersheds of Belize coverage is one of a few base layers developed by the U.K. Directorate of Overseas Surveys (DOS), based on the 1:50,000 OS topographic sheets and deposited directly at the Land Information Centre (LIC) at its inception in 1992. The version presented here - re-projected from Geographic Coordinate System into the original UTM-NAD27 (zone 16) projection - was made public through release of this dataset to the CCAD - the Central American Commission on Environment & Development.
This dataset was released to the CCAD for the purpose of providing researchers with access to certain base datasets to manipulate, for various purposes.
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Please recognize the U.K. Directorate of Overseas Surveys (DOS) as the original source of this data.
There are several instances of streams / rivers crossing watershed boundaries, prompting an update of this coverage using NASA's 90m SRTM data.
Because of projectional difficulties, there is a displacement of about 120-150m east.
The data provided by CCAD was downloaded and re-projected from the Geographic Coordinate System (GCS) into North America Datum (NAD) 1927-Zone 16. Polygons were also merged to allow for only one polygon per watershed. (The original GCS data also indicates various features within watersheds as distinct polygons.)
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Internal feature number.
ESRI
Feature geometry.
ESRI
Although this data set has been released by CCAD, CZMAI and the World Resources Institute, no warranty is expressed or implied.
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