Example 1 - Plotting a Polyarc

The “screenshots” below will take you through an example showing how to plot a polyarc—based upon the calculations used in putting together the pocket_polyarc_mo_test_file.html test file mentioned on the Instructions page. This example will give you a feel for the polyarc plotting process.

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Above: A “screenshot” of the test file linked-to on the Instructions page, showing the approximated “field of view” of this 2011 panoramic image taken on Cape May Beach in Cape May, New Jersey—discussed in this website article. The vertex of the two yellow polylines in the screenshot is the approximated spot on the beach from where the individual panoramic-image photos were taken.
The bearing (or angle measured clockwise from due north [straight up on the “screenshot” above]) of the left side of the panoramic image was estimated to be 65 degrees. The bearing of the right side of the panoramic image was estimated to be 113 degrees.
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Above: To set a 65-degree bearing for the yellow Poly-A polyline—and a length of 160.9344 kilometers (100 miles) from the polylines’ vertex (marker “V”) to the red end-marker “A” (as the Poly-A polyline is configured in the test file)—click the green “A” button in the “Poly-A” section of the “Polys” section of the LPanel, then enter into the “Poly-A len” input box “160.9344” (the default setting is “kilometers” for the “Poly-A len” input box) and enter “065” into the “Poly-A brg” input box—then click the “Update Poly-A Lat/Lng” button.
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Above: The yellow Poly-A polyline is now in place at a “bearing” of 65-degrees, and a “length” of 160.9344 kilometers (100 miles).
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Above: To set a 113-degree bearing for the yellow Poly-B polyline—and a length of 160.9344 kilometers (100 miles) from the polylines’ vertex (marker “V”) to the red end-marker “B”—click the green “B” button in the “Poly-B” section of the “Polys” section the LPanel, then enter into the “Poly-B len” input box “160.9344” and enter “113” into the “Poly-B brg” input box—then click the “Update Poly-B Lat/Lng” button.
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Above: The yellow Poly-B polyline is now in place at a “bearing” of 113-degrees, and a “length” of 160.9344 kilometers (100 miles).
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Now you might choose to “drag” the faded-white circle to the right with your cursor, and “resize” the circle smaller by latching your cursor onto one of the four-cornered “white dots” on the faded circle’s circumference, moving the “white dot” towards the circle’s center.
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With everything where you want it, click on the “LMC” (Locked markers/circle, noneditable circle) radio button, and then the “Update Map/Clear PolyPocket” button, to lock everything in place on the Google map.
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With the Google map “zoomed in” to your preference, begin plotting your polyarc path by repeatedly clicking your cursor along the outer edge of the faded-white circle, at short intervals, starting at the intersection of upper Poly-A polyline and the faded-white circle’s circumference.

Continue to Example 2
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