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comparison cmd/octree2contour/main.go @ 921:52cb0b82b490

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Simplify contour lines on storage Simplifying with a tolerance of 0.1 m can significantly reduce storage requirements and improve performance of a WMS on top of the results without visible losses for high resolution data.
author Tom Gottfried <tom@intevation.de>
date Thu, 04 Oct 2018 18:53:22 +0200
parents 39b5cf9a6b8f
children 0a0013fbda4a
comparison
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920:862cc5ba4d1d 921:52cb0b82b490
11 "gemma.intevation.de/gemma/pkg/octree" 11 "gemma.intevation.de/gemma/pkg/octree"
12 ) 12 )
13 13
14 var ( 14 var (
15 one = flag.Bool("o", false, "create only a single contour") 15 one = flag.Bool("o", false, "create only a single contour")
16 step = flag.Float64("s", 0.5, "step with") 16 step = flag.Float64("s", 0.5, "step width")
17 tol = flag.Float64("t", 0.1, "tolerance for simplification")
17 max = flag.Float64("m", 10, "max height from lowest point") 18 max = flag.Float64("m", 10, "max height from lowest point")
18 bottleneck = flag.String("bottleneck", "", "bottleneck id") 19 bottleneck = flag.String("bottleneck", "", "bottleneck id")
19 date = flag.String("date", "", "date info") 20 date = flag.String("date", "", "date info")
20 ) 21 )
21 22
109 log.Printf("loading took: %v\n", time.Since(start)) 110 log.Printf("loading took: %v\n", time.Since(start))
110 start = time.Now() 111 start = time.Now()
111 all := process(tree) 112 all := process(tree)
112 log.Printf("processing took: %v\n", time.Since(start)) 113 log.Printf("processing took: %v\n", time.Since(start))
113 start = time.Now() 114 start = time.Now()
114 if err = store(all, tree.EPSG, *bottleneck, dateInfo); err != nil { 115 if err = store(all, tree.EPSG, *bottleneck, dateInfo, *tol); err != nil {
115 log.Printf("error: %v\n", err) 116 log.Printf("error: %v\n", err)
116 } 117 }
117 log.Printf("storing took: %v\n", time.Since(start)) 118 log.Printf("storing took: %v\n", time.Since(start))
118 } 119 }
119 } 120 }