Execution from the command line

Demcompare is executed from the command line with an input configuration file:

demcompare config_file.json #run demcompare

The following code-block is an input configuration file example including both coregistration, statistics and report steps with demcompare data samples.

{
    "output_dir": "./test_output/",
    "input_ref": {
        "path": "./srtm_ref.tif"
    },
    "input_sec": {
        "path": "./srtm_blurred_and_shifted.tif"
    },
    "coregistration": {
        "method_name": "nuth_kaab_internal"
    },
    "statistics": {
        "alti-diff": {
            "remove_outliers": false
        }
    },
    "report" : "default"
}

The coregistration and report steps are optional. Remove one of them from the config file to prevent demcompare from running it.

The mandatory statistics step includes an alti-diff DEM processing methods section. This alti-diff configuration allows to compute the difference in altitude between the two input DEMs. All DEM processing methods can be found in List of DEM processing methods. They can be used one after the other in the statistics step.

The optional report step generates a report from computed statistics.

Configuration parameters are described in associated sub-sections:

• Input DEM

• Coregistration

• Statistics

• Generated output report