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FIGURE 9-12 Temporary GCP for one-time use installed by applying spray paint to the bare soil surface. El Houmer rill erosion test site, Souss Valley, Morocco. Kite aerial photograph (subset, in original resolution) by IM and JBR, March 2006.

FIGURE 9-13 Because most SFAP platforms can be seen from a distance, visitors from the local population or administration during a survey are not rare. Bear in mind, when unpacking the survey equipment in the field, that it might be useful to delegate one of the team as a visitor supervisor, because it might be necessary to enforce the look-but-do-not-touch principle. Here, JBR is keeping the village youth away from dangerous kite ropes near Gangaol, Burkina Faso. Photo by IM, December 2001.

FIGURE 9-13 Because most SFAP platforms can be seen from a distance, visitors from the local population or administration during a survey are not rare. Bear in mind, when unpacking the survey equipment in the field, that it might be useful to delegate one of the team as a visitor supervisor, because it might be necessary to enforce the look-but-do-not-touch principle. Here, JBR is keeping the village youth away from dangerous kite ropes near Gangaol, Burkina Faso. Photo by IM, December 2001.

without having any objections against the flying machines or the activities. Nevertheless, this attitude can change quickly, regardless of the country, when surveying markers are set out and equipment, such as a total station, is unpacked or employed. People become apprehensive that some type of building or development is about to take place without their prior knowledge and which might damage their land, economic stability, or privacy. Even parking a vehicle in an unexpected location could raise concerns by land owners, who may call the local police to investigate. Sensitive explanation and authorization papers (see below) are necessary, but still may not clear up all reservations. One of the most important points is providing frank information to the local population concerning the purpose of the flight and survey activities, preferably before a confrontation happens in the field.

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