Shift Elevation Bands

The Shift Elevation Bands tool is used to apply a vertical shift to one or more elevation bands (Depth, Height, etc.) of an existing raster surface or point cloud, to create an output surface with an increased or decreased Z value. There are numerous shift types available; this document describes the SPINE shift type. See Vertical Shift for information on the other shift types.

The SPINE shift type is used to apply water level data to surfaces. This shift is achieved by connecting to the SPINE Water Level service provided by the Canadian Hydrographic Service (CHS). Requests are sent to the service for the water level values of specific sets of data points at specific times. Data is then returned for the requested points and times and applied to the matching points in the selected surface.

If your network is using a firewall, ensure that your Connection proxy settings are defined in Options before attempting to connect to the service.

This shift type is only available if the SPINE module is enabled. See Modules for information about the modules in BASE Editor.

The Vertical Shift tool is also available through the ShiftElevationBands process in the CARIS Batch utility. Refer to the CARIS Batch Utility Reference Guide for more information on the command line tool.

The Shift Elevation Bands command uses the following dialog box.

Option	Description
Source	The input data for the process. The Source is defined by the coverage that was selected at the time the command was initiated. This field cannot be changed.
Format	The type of shift to be applied.
Options	The options for the selected shift type. The available options will differ based on the selection in the Format drop-down list. If you hover the mouse cursor over the name of an option, a brief description of the option is displayed in a tooltip.
Input Band	Bands to be included in the output and have their values shifted. Any band with a Z value can be shifted. 1. Click to populate the check box of each band to be shifted in the output.
Include Band	Bands to be included in the output without their values being shifted. 1. Click to populate the check box of each band to be included in the output. If a computed band is included in the output, that band will lose its dynamic status and will no longer be affected by changes to the primary elevation band.
Output Vertical Coordinate Reference System	You have the option of selecting the vertical coordinate reference system for the output. The vertical component is added to the metadata of the coverage, but does not apply any vertical transformations. The options available in the list are controlled by the Vertical Coordinate Reference System database. This list can be edited using the Reference System Editor tool. For more information, see Vertical Reference System Editor.
Comments	Optional textual information to explain the shift applied to the data.
User Name	The user name for the account being used to connect to the SPINE online service.
Password	The password for the account being used to connect to the SPINE online service.
URL	The URL of the service to which you want to connect, for example: https://ws-shc.qc.dfo-mpo.gc.ca/spine The URL can contain the port number if it is needed to access the service.
Proxy	The proxy settings needed to access the internet and connect to the service if your computer is on a network that is behind a firewall.
Time	The time period of the tide data to be applied. Water level data differs depending on the time of day. To ensure that you have accurate data, you must apply data for the correct time period. The SPINE service, at the time this document was written, supports any future date/time up to one month in the future. The time of day, which defaults to 12:00:00 AM once a date is selected, must be entered in Universal Time Coordinated (UTC) format.
Output filename	The name and location for the output coverage file.

4. In the Input Band field, select each elevation band you want to include and shift in the resulting coverage.

6. [Optional] Click the check box to enable the Output Vertical Coordinate Reference System drop-down list and select an option from the list.

7. Enter credentials for the SPINE service in the User Name and Password fields.

9. [Optional] Click the Proxy check box to enable the option and specify a proxy address.

10. Enter or select the appropriate date and time of the data to be applied in the Time field.

11. Click the Output browse button (...) to select a name and location for the new coverage.

A new coverage is created and added to the Project and Layers windows. The Z values in the selected bands are shifted according to the selected method. The Lineage property for the new coverage provides information on how it was created and details of the shift applied.