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Google Summer of Code – my project at Marble
Hello everybody! I am Cezar, 19, from Romania, future freshmen at Yale University where I will (probably) major in Computer Science. Even though I started it a little bit too late, this blog is going...
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Exemplification of Marble GeoData: GeoDataLineString and GeoPainter
In order to display features such as place marks, images, polygons, textual descriptions and so on, Marble implemented a set of classes, the GeoData ones, with a structure similar to Google’s KML...
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Projections
Map projections are methods of representing the surface of a sphere / a three-dimensional object (i.e. the Earth) on a plane. Marble has a total number of three different kinds of projections: 1....
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Performance analysis
As a preparatory step for changing the Atlas map, Marble’s vector graphics painter, the GeoPainter, needs to be tested and optimized as much as possible, by loading big KML files, using different...
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Performance analysis – II
The times obtained for the entire 600000 nodes line string are decent, but luckily they can be improved. The ultimate purpose of this optimization is to apply the Douglas-Peucker filtering algorithm on...
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Performance analysis – III – Douglas-Peucker
The next measurement done was after implementing the Douglas-Peucker algorithm for filtering the line string. The principle behind this algorithm is pretty simple: after choosing an epsilon value, the...
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Yuppy, SHP format is rendered properly!
The last week was pretty full of Marble for me, and my main two targets were to implement the last (and best ) version of Douglas-Peucker filtering and to solve the Antarctica bug. Douglas-Peucker...
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Bye bye Plain Map
Hello again Marble fans! As August approaches, the process of replacing the Atlas map is progressing and producing pretty good results. Last time I posted, I managed to open SHP and make them work...
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