Checking the "Enable advanced options in modules" box in the Settings module will result in additional options to be accessible to the user across different modules of AccessMod, as shown in the information reported in the following table:
Module/tool | Section | Advanced option | Description |
|---|---|---|---|
Data | Filter | Show internal data check button | Checking this button will make several types of internal data sets visible to the users (e.g., "friction", "speed", and "landcover merged bridge" raster data sets) in the "Available Data" table. See below for an explanation of these data sets. |
Toolbox/Merge land cover | Roads tab | Show checkbox to "Do not add 1000 to class < 1000" | If this button is checked, the values of the road categories (if <1000) will be kept as they are defined in the road layer (and 1000 will not be added to these categories) |
Referral | Analysis settings | Optimize dynamically computation according to the scenario | This option limits the computation zone around the current facility. A buffer is first created around the facility, using with the fastest speed of the defined scenario. The footprint of this buffer is then user to crop the mergelandcover, so that the computation is done using a much smaller grid. This can drastically reduce the computation time. |
Referral | Analysis settings | Save analysis parameters without computing | This option is used to prepare the analysis and its configuration file which is then saved, but the analysis is not executed. The configuration file can then be used with the Replay mode. |
Referral | Analysis settings | Use 'floor' rounding when converting travel time from seconds to minutes | Historically, AccessMod uses a floor function to convert travel times from seconds to minutes (i.e., 59.9 min → 59 min) to have the travel time rasters s integer raster. This had to be changed to a ceiling function from version 5.8 onward. The default behaviour is now 59.9 min → 60 min. If this floor rounding option is checked, the behaviour gets back to the historical use of the floor function. |
The internal data sets are the following
- Friction raster of class “friction”: Raster format layer containing the spatial distribution of the frictions (i.e. the resistance that one encounter when moving across the cells in a raster format layer). This is expressed in number of seconds to travel through a cell.
- Speed raster of class "speed": Raster format layer containing the spatial distribution of the speeds used in the analysis. The values in the raster correspond to a composite suite of numbers. The first number is the code for the travelling mode (1: walking; 2: bicycling; 3: motorized). The six following numbers is the speed in km/h, with the first 3 numbers for the integer part, and the three following ones for the decimal part. As an example, the number "2012500" corresponds to bicycle with a speed of 12.5 km/h.