Talk:Exercise 29
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==Color settings== | ==Color settings== | ||
| − | We work in GRASS here, so the color has either to be set by {{typed|text=r.colors}} or exported to e.g. GeoTIFF by {{typed|text=r.out.gtiff}}. [[User:Lburgr|- Levent]] | + | We work in GRASS here, so the color has either to be set by {{typed|text=r.colors}} (where histogram-equalized grey scale may be a good option) or exported to e.g. GeoTIFF by {{typed|text=r.out.gtiff}}. [[User:Lburgr|- Levent]] 20:47, 25 December 2010 (CET) |
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==Calculation of index== | ==Calculation of index== | ||
The index is calculated by dividing the near-infrared by the red band. Therefor, a small index represents a healthy vegetation. Would it make sense to calculate the index vice-versa, so that a high number is supposed to represent a healthy vegetation, making the ratio more intuitively to understand? [[User:Lburgr|- Levent]] 20:36, 25 December 2010 (CET) | The index is calculated by dividing the near-infrared by the red band. Therefor, a small index represents a healthy vegetation. Would it make sense to calculate the index vice-versa, so that a high number is supposed to represent a healthy vegetation, making the ratio more intuitively to understand? [[User:Lburgr|- Levent]] 20:36, 25 December 2010 (CET) | ||
Revision as of 21:47, 25 December 2010
Color settings
We work in GRASS here, so the color has either to be set by r.colors (where histogram-equalized grey scale may be a good option) or exported to e.g. GeoTIFF by r.out.gtiff. - Levent 20:47, 25 December 2010 (CET)
Calculation of index
The index is calculated by dividing the near-infrared by the red band. Therefor, a small index represents a healthy vegetation. Would it make sense to calculate the index vice-versa, so that a high number is supposed to represent a healthy vegetation, making the ratio more intuitively to understand? - Levent 20:36, 25 December 2010 (CET)
