Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/ChangeLog @ 433:828df3ddb758
Added interpolation capabilities along z axis to XYColumns.
gnv-artifacts/trunk@481 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Wed, 23 Dec 2009 12:20:25 +0000 |
| parents | 6a70e8883307 |
| children | 0eed5749fd63 |
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| 432:6a70e8883307 | 433:828df3ddb758 |
|---|---|
| 1 2009-12-23 Sascha L. Teichmann <sascha.teichmann@intevation.de> | 1 2009-12-23 Sascha L. Teichmann <sascha.teichmann@intevation.de> |
| 2 | 2 |
| 3 * src/main/java/de/intevation/gnv/math/XYColumn.java: Added a method | |
| 4 prepare() which generates an continues interpolator for the | |
| 5 given z values. if only one value is given a constant function | |
| 6 is assumed. If the larger z-value is below zero the | |
| 7 next lower value is supplemented at zero. Symmetrically | |
| 8 if the lowest z-value is above the depth at the given point | |
| 9 the lowest value is repeated at depth. This should guarantee | |
| 10 that the gradient is vansihing towards the surface and the | |
| 11 bottom of the ocean. | |
| 12 | |
| 13 If after the supplementation there are less than three points | |
| 14 a linear interpolation is performed. If there are more than three | |
| 15 points a higher degree interpolation is used instead. This defaults | |
| 16 to a cubic spline interpolation. Overwrite the getInterpolator() | |
| 17 function to replace this behavior. | |
| 18 | |
| 19 * src/main/java/de/intevation/gnv/math/ConstantFunction.java: New. | |
| 20 Constant function used in interpolation. | |
| 21 | |
| 22 * src/main/java/de/intevation/gnv/math/LinearFunction.java: Added | |
| 23 an inner class Univariate which fits into the interpolation | |
| 24 framework. | |
| 25 | |
| 26 * src/main/java/de/intevation/gnv/math/HeightValue.java: Sort | |
| 27 z-Values in descending order because we are below zero. | |
| 28 | |
| 29 * src/main/java/de/intevation/gnv/math/XYDepth.java: New. Interface | |
| 30 to figure out the depth (negative values below surface) for | |
| 31 a given coordinate. TODO: Implement this by query the DEM grid | |
| 32 of the ocean. | |
| 33 | |
| 34 * src/main/java/de/intevation/gnv/math/AttributedXYColumns.java: Added | |
| 35 authors. | |
| 36 | |
| 37 2009-12-23 Sascha L. Teichmann <sascha.teichmann@intevation.de> | |
| 38 | |
| 3 * src/main/java/de/intevation/gnv/state/profile/verticalcrosssection/VerticalCrossSectionOutputState.java: | 39 * src/main/java/de/intevation/gnv/state/profile/verticalcrosssection/VerticalCrossSectionOutputState.java: |
| 4 When preprocessing database data only dissamble WKT points if we | 40 When preprocessing database data only dissemble WKT points if we |
| 5 have to. | 41 have to. |
| 6 Read z values as double value now. | 42 Read z values as double value now. |
| 7 Commented out CSV export because it takes the database data | 43 Commented out CSV export because it takes the database data |
| 8 as data which is not correct here. TODO: We need to implement some output | 44 as data which is not correct here. TODO: We need to implement some output |
| 9 based on the interpolated data. | 45 based on the interpolated data. |