The mapping of environmental features with aerial photography and geographic information systems (GIS) can be a useful means to display and to analyze vegetative cover. Eighty-one plant species (Division Tracheophyta) were classed according to four criteria contributing to their conservation value as endemic species of Massif de la Hotte. The selected criteria included abundance, elevation amplitude, response to disturbance and habitat specificity. The individual species values were summed for each 100-meter elevation contour from 900 m to 2300 m within Pic Macaya National Park, located 160 km west of Port-au-Prince, Haiti. The data were normalized and scaled from 0–100. A range of 15–37 endemic species were found along the altitudinal range with important concentrations at 1000 m (37 species) and 2100 m (26 species). Orthomaps were constructed by combining ArcInfo grids with geo-referenced aerial photos to display the trends observed in this study. The integration of GIS with aerial photos offers a promising tool to combine botanical and zoological databases with remote images for scientific, educational and conservation management purposes.