Provide breakline (fault line) support for surface interpolation modules

[marisn]

Current v.surf.* modules do not support breaklines (fault lines). It's common in geology and other fields to have line/surface that limits interpolated value expansion - interrupts spatial correlation (neighborhood influence).

IMHO breaklines should be taken into account at two times - first when choosing data input points for calculation (only points at one side of line) and second time - when assigning values for cells - only cells at one side of line should receive values.

I understand that this is longterm goal and it requires lot of discussions how it should be implemented. Still it's a wanted feature.

[hamish]

try v.surf.icw from addons.

​http://grass.osgeo.org/wiki/GRASS_AddOns#v.surf.icw ​http://grass.osgeo.org/wiki/Image:Inlets_03_SurfSal_icw_big.png

it is very computationally expensive so number of starting points should be kept low.

Hamish

[hamish]

see also Alexander Muriy's v.triangle addon module,

​http://grasswiki.osgeo.org/wiki/TIN_with_breaklines

Hamish wrote:

try v.surf.icw from addons. [...] it is very computationally expensive so number of starting points should be kept low.

note the new version isn't quite as expensive as the old, and now supports multi-processing. Probably should still be limited to less than a few hundred input points though.

Hamish

[martinl]

Milestone renamed

[neteler]

Ticket retargeted after milestone closed

[martinl]

All enhancement tickets should be assigned to 7.6 milestone.

[martinl]

Ticket retargeted after milestone closed

[martinl]

Ticket retargeted after milestone closed