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ANNUAL ACTIVITY REPORT - Instituto de Biologia da UFRJ

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a b<br />

x: 427219<br />

y: 3115143<br />

Figure 4. a) Georeferenced IRPs equidistant from each other; b) <strong>de</strong>tail of the georeferenced IRPs and 100 m off-set line.<br />

Determination of the sea Image Reference Points<br />

(IRPs)<br />

e achievement of the sea IRPs was done through the use<br />

of the same georeferenced base map as used for the land<br />

IRPs. A er tests for <strong>de</strong>termination of the sea points an<br />

o -set line 100 m away from the coastline was employed<br />

in or<strong>de</strong>r to bear every possible view of the Peninsula while<br />

not allowing overlap of the images. From that o -set line<br />

several distances were tested to <strong>de</strong>termine the points, and<br />

it was conclu<strong>de</strong>d that to achieve a photographic scan of the<br />

entire Keller Peninsula 49 points would be su cient. en<br />

applied the same way of division as the land points thus<br />

resulting in 49 georeferenced points equidistant from each<br />

other about 160 m between them (Figure 4). From that<br />

division were obtained IRPs from 1 to 49, where each has<br />

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x: 427358<br />

y: 3115236<br />

x: 427463<br />

y: 3115712<br />

x: 427419<br />

y: 3115546<br />

x: 427440<br />

y: 3115379<br />

a speci c coordinate. Figure 5. Example of scheme for obtaining pictures (IRP 16).<br />

Science Highlights - Thematic Area 4 |<br />

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