Applications/app_SARDEMGrid.md

+# SARDEMGrid
+
+Computes deformation DEM grid.
+
+## Description
+
+This application creates a deformation grid related to the DEM with projections into Master and Slave SAR geometries.
+The output grid is a VectorImage composed of three values : shift in range, shift in azimut and a number of DEM points for contribution. The inputs of this application are SAR images. This application can directly take the projected DEM as inputs.
+
+## Parameters
+
+**Input SAR Master image** `-insarmaster image` *Mandatory* <br />
+Master SAR Image.
+
+**Input SAR Slave image** `-insarslave image` *Mandatory* <br />
+Slave SAR Image.
+
+**Input DEM** `-indem image` *Mandatory* <br />
+Input DEM.
+
+**Input vector of DEM projected into SAR Master geometry** `-indemprojmaster image` <br />
+Input vector of DEM projected into SAR Master geometry.
+
+**Input vector of DEM projected into SAR Slave geometry** `-indemprojslave image` <br />
+Input vector of DEM projected into SAR Slave geometry.
+
+**Output DEM grid (Vector Image)** `-out image [dtype]` *Mandatory* <br />
+Output DEM Grid Vector Image (Shift_ran, Shift_azi, NbDEMPts for contribution).
+
+**MultiLook factor on distance** `-mlran int` *Default value: 3* <br />
+MultiLook factor on distance.
+
+**MultiLook factor on azimut** `-mlazi int` *Default value: 3* <br />
+MultiLook factor on azimut.
+
+**Grid step for range dimension (into SLC/SAR geometry)** `-gridsteprange int` *Default value: 150* <br />
+Grid step for range dimension (into SLC/SAR geometry).
+
+**Grid step for azimut dimension (into SLC/SAR geometry)** `-gridstepazimut int` *Default value: 150* <br />
+Grid step for azimut dimension (into SLC/SAR geometry).
+
+**Available RAM (MB)** `-ram int` *Default value: 256* <br />
+Available memory for processing (in MB).
+
+## Examples
+
+From the command-line:
+
+```
+otbcli_SARDEMGrid -indem ./S21E055.hgt -insarmaster s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_ML.tiff -insarslave s1b-s4-slc-vv-20160929t014610-20160929t014634-002277-003d71-002_ML.tiff -out demGrid.tif
+```
+
+From Python:
+
+```
+import otbApplication
+
+app = otbApplication.Registry.CreateApplication("SARDEMGrid")
+
+app.SetParameterString("indem", "./S21E055.hgt")
+app.SetParameterString("insarmaster", "s1a-s4-slc-vv-20160818t014650-20160818t014715-012648-013db1-002_ML.tiff")
+app.SetParameterString("insarslave", "s1b-s4-slc-vv-20160929t014610-20160929t014634-002277-003d71-002_ML.tiff")
+app.SetParameterString("out", "demGrid.tif")
+
+app.ExecuteAndWriteOutput()
+```
+
+## Limitations
+
+Only Sentinel 1 products are supported for now.