mechanicalwasabi: 【SAGA】SAGAを使ってみる

あんまり日本語のソースがないので動かし方だけでも（Windowsです）

1．SAGAをダウンロードする（2013.6.3現在ver.2.0.8が最新）
2．適当なディレクトリにインストール（というか解凍）
3．コマンドプロンプトを起動
4．SAGA本体のありかを指定する
　　>PATH=%PATH%;ここに2でインストールした場所（パス）を書く
例えば、PATH=%PATH%;C:\saga208
5．SAGAのモジュールのありかを指定する
　　>SET SAGA_MLB=ここにmodulesへのパスを書く
　　例えば、SET SAGA_MLB=C:\saga208\modules
6．作業場所へ移動する[C:\gis で作業する場合]
　　>cd /d C:\gis
7．どんなモジュールがあるか見てみる
　　>saga_cmd

長いけどこんな感じ
>C:\gis>saga_cmd
_____________________________________________
##### ## ##### ##
### ### ## ###
### # ## ## #### # ##
### ##### ## # #####
##### # ## ##### # ##
_____________________________________________

error: module library

available module libraries:
- contrib_a_perego.dll
- docs_html.dll
- docs_pdf.dll
- garden_3d_viewer.dll
- garden_webservices.dll
- geostatistics_grid.dll
- geostatistics_kriging.dll
- geostatistics_points.dll
- geostatistics_regression.dll
- grid_analysis.dll
- grid_calculus.dll
- grid_calculus_bsl.dll
- grid_filter.dll
- grid_gridding.dll
- grid_spline.dll
- grid_tools.dll
- grid_visualisation.dll
- ihacres.dll
- imagery_classification.dll
- imagery_rga.dll
- imagery_segmentation.dll
- imagery_tools.dll
- io_esri_e00.dll
- io_gdal.dll
- io_gps.dll
- io_grid.dll
- io_grid_grib2.dll
- io_grid_image.dll
- io_odbc.dll
- io_shapes.dll
- io_shapes_dxf.dll
- io_shapes_las.dll
- io_table.dll
- lectures_introduction.dll
- opencv.dll
- pj_georeference.dll
- pj_geotrans.dll
- pj_proj4.dll
- pointcloud_tools.dll
- pointcloud_viewer.dll
- recreations_fractals.dll

error: Library does not contain executable modules [recreations_games.dll]
- shapes_grid.dll
- shapes_lines.dll
- shapes_points.dll
- shapes_polygons.dll
- shapes_tools.dll
- shapes_transect.dll
- sim_cellular_automata.dll
- sim_ecosystems_hugget.dll
- sim_fire_spreading.dll
- sim_hydrology.dll
- table_calculus.dll
- table_tools.dll
- ta_channels.dll
- ta_compound.dll
- ta_hydrology.dll
- ta_lighting.dll
- ta_morphometry.dll
- ta_preprocessor.dll
- ta_profiles.dll
- tin_tools.dll
- tin_viewer.dll
- vigra.dll

63 SAGA Module Libraries

type -h or --help for further information

――――――――――ココまで

8．水文解析をするとすると　ta_hydrologyを使ってみたいかもしれない
{他にどんなモジュールがあるかは（http://spatial-analyst.net/DATA/SAGA_GIS_2_0_6.txt）に詳しい。誰かが訳さないといけないんだとは思う。}

>C:\gis>saga_cmd ta_hydrology
_____________________________________________
##### ## ##### ##
### ### ## ###
### # ## ## #### # ##
### ##### ## # #####
##### # ## ##### # ##
_____________________________________________

error: module

executable modules:
0 - Catchment Area (Parallel)
1 - Catchment Area (Recursive)
2 - Catchment Area (Flow Tracing)
4 - Upslope Area
6 - Flow Path Length
7 - Slope Length
10 - Cell Balance
13 - Edge Contamination
15 - SAGA Wetness Index
16 - Lake Flood
18 - Catchment Area (Mass-Flux Method)
19 - Flow Width and Specific Catchment Area
20 - Topographic Wetness Index (TWI)
21 - Stream Power Index
22 - LS Factor

type -h or --help for further information

――――――――――ココまで

Topographic Wetness Index (TWI)を計算したい場合は、ta_hydrologyの20というモジュールを使えば良いことがわかる。

9．使い方の調べ方は、先ほどと同様
　　
>C:\gis>saga_cmd ta_hydrology 20
_____________________________________________
##### ## ##### ##
### ### ## ###
### # ## ## #### # ##
### ##### ## # #####
##### # ## ##### # ##
_____________________________________________

library path: C:\GIS\saga208\modules
library name: ta_hydrology
module name : Topographic Wetness Index (TWI)
author : O.Conrad (c) 2003
_____________________________________________
go...
Usage: 20 -SLOPE -AREA [-TRANS ] -TWI [-CONV ] [-MET
HOD ]
-SLOPE: Slope
Grid (input)
-AREA: Catchment Area
Grid (input)
-TRANS: Transmissivity
Grid (optional input)
-TWI: Topographic Wetness Index
Grid (output)
-CONV: Area Conversion
Choice
Available Choices:
[0] no conversion (areas already given as specific catchment area)
[1] 1 / cell size (pseudo specific catchment area)
-METHOD: Method (TWI)
Choice
Available Choices:
[0] Standard
[1] TOPMODEL

とこんな具合になる

Label

2013/06/03

【SAGA】SAGAを使ってみる