Indonesia’s ‘Atlas from Space’

Indonesia’s ‘Atlas from Space’

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The atlas includes satellite images, aerial photographs, maps along with narratives about 100 most popular tourist spots in the country

Indonesia comprises of more than 17,000 islands covering 2,027,087 sq km of land area and 3,166,163 sq km of sea territorial waters. Spreading all over the 33 provinces, the beauties of nature can be found in land as well as in sea. These interesting features could foster tourism industry only if they were supported by the availability of sufficient and accurate information about the most popular tourist spots in the country. Therefore, the National Coordinating Agency for Surveys and Mapping of Indonesia (BAKOSURTANAL) took up the task of developing ‘Atlas of Indonesia from Space’.

Preparation
This stage involved preparing the list of the most popular tourist places, preparation of a base map, identification (icons) of tourist places on the map, field surveys and sourcing of satellite imageries.

Data collection
BAKOSURTANAL sourced satellite images taken by satellites like Shuttle Radar Topographic Mission (SRTM), Landsat ETM+, Quickbird and IKONOS. Field surveys were done before developing topographic maps. Experts from Center for Land Natural Resources Survey, Center for Marine Natural Resources Survey, Center for Basic Mapping of Marine and Aerospace, Center for Atlas and tourism offices from different provinces provided important data for the maps. Experts visited tourist spots and wrote narratives which included all the important information about them.

Data processing
Experts selected the best satellite images and put them together with aerial images, maps and narratives. Satellite imagery processing covered geometric correction, radiometric correction, filtering, fusion, contrast sharpening, and pan sharpening. Geometric correction made imagery coordinate system in accordance with maps coordinate system so that object position visibility could be plotted on maps. Radiometric corrections were done to improve the quality of images. Filtering was done to accentuate the objects and to omit spectral variations. Fusion of band lines was done to generate better contrast. Contrast sharpening was done to gain clear visualisation between object and its surroundings. Pan sharpening on imagery was done to gain higher spatial resolution. Photos taken by hand-held cameras too needed corrections.

Data compilation
Presentation of satellite images, aerial photos and maps were grouped as cartographic content while terrestrial pictures and texts were grouped as non-cartographic content. Sumatra has 59 images more than the others, while Papua has less images, pictures and maps information. The ‘Atlas from Space’ has been playing a vital role in fostering the tourism industry in Indonesia.