Digital orthophotography and LIDAR data to control and management of Tierra Bomba island littoral, Colombian Caribbean
DOI:
https://doi.org/10.26640/22159045.187Keywords:
Littoral, control and management, DIMAR ́s jurisdiction, Colombian CaribbeanAbstract
As a result of the anthropic pressure on the colombian littorals, mainly on the beaches and the intertidal zones (those understood between the highest and the lowest tide line), the National Maritime Authority, has defined and adopted, a conceptual model based, among other components, in the use of digital ortophotography and data of the LIDAR sensor (Light Detection And Ranging) for the production of a digital cartographic base on which settles down technically the limit of the jurisdiction of the National Maritime Authority to control and management the littoral on Tierra Bomba island.
The use of the two techniques of remote sensing (digital aerial photography and airborne LIDAR sensor) in Tierra Bomba island, understood the application of the conceptual model, the verification of their results in terrain, the analysis and discussion of the preliminary limit of DIMARS ́s jurisdiction, the storage of the spatial information of jurisdiction in the Institutional Geographic Information System of DIMAR and finally, the development of the control and management of the littoral by the National Maritime Authority.
The obtained results included, in the first place, the digital cartographic base of the study area, composed by 28 orthophotomaps to scale 1:2000; the interpolation from the Digital Terrain Model - DTM generated from LIDAR data, of the ellipsoidal height of the highest tide line in the study area; the identification of 39 groins around the island; the identification of 29 species of coastal vegetation belonging to 18 families reported in 9 transects; the spatial position of the internal beach limit; the identification of 68 areas subjected to anthropic landfill (embracing a total area of 23.23 hectares) mainly in the populated centers of Caño del Oro and Bocachica; localization and quantification of the flood plains due to an eventual sea level rise (35.7 hectares for an eventual rise of 30 cm and 331.1 hectares for a rise of 100 cm); outlined of the preliminary limit of the DIMAR ́s jurisdiction and the structuring and storage of the spatial and alphanumeric information in the Corporative Geodatabase of the National Maritime Authority.
Concerning to public's use goods under jurisdiction, was established that 10.27 hectares correspond to beaches; 273.74 hectares to intertidal zones and 228.66 hectares to fifty meters fringe of jurisdiction, for a total of public ́s use goods under jurisdiction of 284.02 hectares.
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