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The new series of Vicmap Topographic maps consists of 1:25000 and 1:50000 double format hardcopy maps, along with 1:30000 A4 and A3 online mapsheets. The new hardcopy maps are gradually replacing the old stock, with the entire state anticipated to be available at 1:50000 by December 2008. [2]
Slightly more complex algorithms rely on local optimization to reach a local optimum of a placement evaluation function – in each iteration placement of a single label is moved to another position, and if it improves the result, the move is preserved. It performs reasonably well for maps that are not too densely labelled.
Two or more objects of known position are sighted, and the bearings recorded. Bearing lines are then plotted on a chart through the locations of the sighted items. The intersection of these lines is the current position of the vessel. Usually, a fix is where two or more position lines intersect at any given time.
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Position resection and intersection are methods for determining an unknown geographic position (position finding) by measuring angles with respect to known positions.In resection, the one point with unknown coordinates is occupied and sightings are taken to the known points; in intersection, the two points with known coordinates are occupied and sightings are taken to the unknown point.
Before the division of the Port Phillip District into counties, the colony was divided into land districts, as shown on an 1864 map. [8] The land districts were used as the names for parts of the state where counties had yet to be proclaimed. The land districts included: Bourke Land District (Melbourne area, including the County of Bourke)
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