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GIS Methodologies for Developing Conservation Strategies Part 8

Bản đồ này sau đó đã được che phủ với các điểm dữ liệu động vật hoang dã để lấy được đa giác môi trường sống của động vật hoang dã. Một ví dụ về quá trình chuyển đổi dữ liệu điểm dữ liệu đa giác được cung cấp để hình dung chất lượng của dữ liệu động vật hoang dã. | Data Collection and Analysis 167 the habitat map. This map was then overlaid with the wildlife data points to derive wildlife habitat polygons. An example of the process of converting point data to polygonal data is provided in order to visualize the quality of wildlife data. An example of the original point data collected for the white-faced capuchin Cebus capucinus is presented in figure 13.2. The 313 data points for the white-face capuchin were overlaid with the habitat map and all polygons containing data points were filled. The resultant data file presented in figure 13.3 is the GIS file used in the gap analysis for the white-faced capuchin discussed in detail in the next chapter. An overlay of all four primate species is presented in figure 13.4. Since the geographic range of the squirrel monkey Saimiri oerstedii is limited to the southern region of Costa Rica all four species are present only in that area. By overlaying all four primate distributions it is possible to identify numerous areas utilized by one or two species. Likewise one can see the few areas utilized by three or more of the primate species. The same procedure was employed for all twenty-one species distributions plate 3 . Note the large area of the country where there were no species sighted. These white polygons are either developed areas where wildlife is seldom seen or remote areas where the humans who were interviewed had seldom been. No Fig. 13.2 Original point data collected for the white-faced capuchin Cebus capuc-inus Fig. 13.3 Polygonal habitat data for the white-faced capuchin Cebus capucinus Fig. 13.4 Overlay map of all four primate species Data Collection and Analysis 169 polygons were identified as being utilized by more than eighteen of the twenty-one species. Those areas having the highest species overlay intensity fifteen to eighteen species pink shading included Osa Guanacaste and Tortuguero figure 2.2 which was expected as they are some of the most biologically diverse areas