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<< Click to Display Table of Contents >> Processing Interfaces - Workflow Overview |
  
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<< Click to Display Table of Contents >> Processing Interfaces - Workflow Overview |
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This page must be intended as a specific description, mainly applicable to the workflow processing panels. Nevertheless some interfaces may require more detailed information about specific files, parameters or settings, which are not considered in the present description; these peculiarities are eventually reported in the relevant section of this guide.
Input
This part of the processing chain is dedicated to the input files and principal parameters required by the workflow. In the different tabs it is possible to enter all mandatory inputs. The following three tabs are available in this section:
➢Input File - The name and location of the input files are entered either as single files or as file list.
➢DEM/Cartographic System - This tab allows either defining the output cartographic reference system, entering the reference Digital Elevation Model or choose an external one to download through the Digital Elevation Model extraction tool. This information will be considered in processes such as the Geocoding, the Interferogram Generation, the Interferometric Digital Elevation Model Workflow and others.
➢Parameters - The principal parameters of the processing chain to be entered.
Output
This is the part in the processing chain dedicated to the output files and options:
➢Output Files - The name and location of the output files are entered either as single files, as file list or output root name. More than one output option might be required
➢Delete Temporary Files - to erase all the intermediate temporary files generated during the processing steps. Otherwise the files are located in the ENVI Output Directory in a folder with the following name: SARsTmpDir_ddmmmyyyy_hhmmss.
Parameters
The interface is structured in parts, showing the name of the steps that will be performed in the workflow. By selecting one of the sections (e.g. "Coregistration", "Filtering", "Flattening", etc.), the appropriate parameters will show up in the dialog. In order to allow both an easy use (for beginners) or a full interaction with all processing parameters (for advanced users) of each step of the workflow, two ways are provided to define the processing parameters in each section:
1.Selecting the "Principal Parameters" from the pull down menu, the most important (and easier to understand) values are visualized with the possibility to modify them. Once this has been done the processing step can be executed without changing any of the additional parameters, which are listed in the menu (see the following paragraph). Any parameter, which is not specifically set by the user, is automatically retrieved by the program from the currently active Preferences. This is the suggested approach for beginners.
2.Beneath the "Principal Parameters", in the pull down menu, there are several groups of advanced parameters, which can be loaded and modified by choice (e.g. coregistration, filtering, flattening, others, etc.). The name of each group is based on the parameters which are contained. Experienced users, who already have a good knowledge of SARscape, often prefer to check and possibly tune all available parameters; this is important in order to exploit the characteristics of the software at their best and also to customize the processing depending on the peculiarities of the input data.
It is worth to mention that the original parameters, which are shown within each interface at first opening, are the same as those written in the currently active Preferences. If one or more parameters are modified in any specific processing interface, these new values are adopted for the subsequent processing, while the values written in the currently active Preferences remain unchanged. In other words, the Preferences are not affected by changes applied on the processing interfaces.
It happens that some portions of the panel appear in light grey (i.e. not editable fields). This is because, in certain processing configurations, those fields must not be considered. This is for instance the case of the "Output Projection", which cannot be specified if a DEM is entered as input; indeed the output cartographic reference system will be the same as the input DEM.
Preview
By setting this flag, at the end of each processing step the intermediate outputs are made available for visualisation/analysis.
< Back
The workflow is brought to the previous step in the chain. This action can also be performed by selecting the desired section in the processing window: if the parameters are changed, all the temporary files generated by the subsequent steps will be erased and the process restarted from the selected section.
Next >
The workflow is moved to the following step in the chain.
Next >>>
Clicking this button all the steps are performed in succession and it is no more necessary to use the "Next >" button. Make sure that all settings in all the steps are correctly set before starting with this processing.
Cancel
The workflow panel is closed.