WMS

Changing the Display Order in WMS

Have you been wanting to change the order that objects are displayed in the Graphics Window for your watershed projects in WMS? Within WMS, there is an option that can allow users to play around with this. This post will review how to utilize the Display Order functionality found in the Display Options dialog within WMS.

To locate the Display Order options in WMS, open up the Display Options dialog, either by clicking the Display Options macro or going to the Display | Display Options... command. Display Order should then be visible as one of the options on the left. There will be a checkbox for if Display Order should be activated or not. By default, this should be turned on.

As might be expected, turning the "Use Display Order" option on will cause objects to be displayed in the order laid out in the Display Order List. When the "Use Display Order" option is turned off, objects will be displayed in front of others based on which have XYZ coordinates closer to the user's eye rather than further. Depending on the scenario, it may be more visually helpful to have the option turned on or off.

For instance, in plan view, a delineated watershed may look better with display order turned on because when it is turned off, objects may look cluttered and bleed through each other. But for another example, in an oblique view, a delineated watershed may look better with display order turned off because when it is turned on, contours may look cluttered because objects are displaying primarily using display order instead of closer ones displaying in front of further ones.

When the "Use Display Order" option is turned on, the Display Order List will be active. The following options can be used to modify the order:

  • Move Up: Moves the selected item one spot higher on the list.
  • Move Down: Moves the selected item one spot lower on the list.
  • Move To Top: Moves the selected item to the very top of the list.
  • Move To Bottom: Moves the selected item to the very bottom of the list.
The Display Order options in WMS

When an item has been moved as far high or low as it can go, any attempt to move it further higher or lower will result in a warning message that you have selected the top or bottom of the list, and to select an item below or above the current selection.

Try out experimenting with display order in WMS 11.1 today!

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How to Change the Temp Directory for WMS

Have you needed to specify the location of a temp directory when working with WMS? Starting in WMS 11.1, you can do this when necessary. It isn’t a feature many users will likely need to bother with, but it will come in handy when you need it. This post will review how to specify the temp directory that WMS will use, and why you might want to.

So what is the significance of temp files and temp directories? Temp files are often used in programs that are dealing with files that use larger amounts of data, such as graphics or video editing software. They help save changes, help programs run efficiently, and can restore progress in the case of a sudden crash or shutdown. They are also designed so that they will be deleted automatically when they are no longer needed.

Your computer should have automatic temp directories that it uses, but sometimes it is required to work with these directories yourself. This may be required for security purposes, to troubleshoot issues, to fulfill legal requirements, or for some other reasons.

This can be done by using the following workflow:

  1. Within WMS, click on Edit | Preferences... to bring up the Preferences dialog.
  2. Go to the General tab of the dialog.
  3. Towards the bottom of the dialog, activate the checkbox for Temporary directory.
  4. Click the Select… button that has now been made active to bring up the Browse For Folder dialog.
  5. Use this dialog to locate which folder will be the new temp directory. This dialog also allows a new folder to be added to your file directory with the Make New Folder button.
  6. The textbox next to the Temporary directory should now be populated with the new temp directory address.
  7. It is recommended to restart WMS for the changes to take effect.
The Temporary direction option in the Preferences dialog

Please note that most users should not play around with this feature. Changing the temp directory typically does not speed up performance or improve functionality. Unless you have a specific reason to change the temp file directory, do not change it as doing so indiscriminately can cause some of WMS’s functionality to stop working.

Besides being able to change the temp directory, check out what else can be done with the Preferences in WMS 11.1 today!

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Using a Shapefile with the Fast Flood Tool

Do you have a shapefile with water surface elevation data you would like to use towards quickly generating floodplain data? WMS can help you with this. The Map Flood tool, sometimes called the Fast Flood tool, has a new feature we have developed that will allow you to use shapefiles as part of the process of generating floodplain data. This post will review how to use shapefiles for fast flood mapping in WMS.

Using a shapefile with the Map Flood tool can be done by using the following workflow:

  1. Use any of the methods to open files to import your shapefiles into your WMS project. If your shapefile coordinates are geographic, WMS may ask you to convert them to a planimetric coordinate system for computational use, in which case, click OK to accept this.
  2. The shapefile should now be visible under GIS Data. Click on the Map Flood macro to open the Floodplain Mapping Options dialog.
  3. Under the Water Surface Elevations section of the dialog, click on Use FEMA Floodplain Boundary and select your shapefile from its associated drop-down and after making any other changes, click OK to close the dialog.
  4. Example of using a shapefile with the Map Flood tool
  5. The Virtual Earth Map Locator may appear if there is not a set projection. Use it to navigate to the location of your shapefile then click OK after making any other changes. Navigation can either be done by inputting latitude and longitude or typing in the location you wish to observe.
  6. A message may appear saying that the feature requires a global projection. Click OK on this to bring up the Display Projection dialog.
  7. Review the projection to make certain it is correct, click OK to close the Display Projection dialog and run the floodplain delineation.
  8. After the Map Flood tool finishes, you will have all the necessary data downloaded, and the floodplain will have been generated.

Importing a shapefile into the project will have allowed it to be used with the Map Flood tool instead of needing to download the shapefile. This can save you time and provide consistency when generating multiple floodplains using the Map Flood tool. This also allows you to use a shapefile generated from the first use of Map Flood tool for additional floodplain generation in the same area.

Try out using shapefiles for fast flood mapping in WMS 11.1 today!

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Viewing Multiple GSSHA Scenarios in a Hydrograph

Have you needed to compare multiple GSSHA scenarios using a single hydrograph? New functionality has been added to WMS that now allows for hydrographs that can display results from multiple GSSHA scenarios. This post will review how multiple GSSHA scenarios can be added to hydrographs, a feature newly introduced in WMS 11.1.

Hydrograph showing multiple GSSHA scenarios

Hydrographs that show multiple GSSHA scenarios plot them all out within the same hydrograph. A legend below the graph will indicate which GSSHA scenario run is which in the hydrograph, as each run should be in a different color and potentially a different line style. The dimensions of the hydrograph will be such that all of the different runs will all be able to be displayed.

To be able to work with hydrographs that show multiple GSSHA scenarios, multiple GSSHA scenarios will need to be loaded into WMS to be compared with each other. This can be done by loading multiple GSSHA projects that use the same area into WMS. These can be saved together as a single GSSHA Group Project (GGP) file if needed.

When these GSSHA scenarios will be run, rather than using the typical Run GSSHA command, instead go to the GSSHA | Run GSSHA Group Command. This will open up the Save and Run GSSHA Group dialog. Here, the projects that will run can be selected, as well as the group filename. When the projects have been selected, clicking OK will close out the dialog and bring up the Model Wrapper dialog. This will be brought up for every scenario that will be run, along with the necessary loading of the data into WMS. This will likely take some time, depending on the nature of the GSSHA scenarios, the amount of data to be loaded in, and the amount of different scenarios that will all need to be run.

Once the entire group of GSSHA scenarios has been run, selecting the hydrograph for viewing should display plots of all of the relevant hydrograph scenarios that have been run. Feel free to examine the data, and potentially experiment with different combinations of geographically related runs.

Try out multiple scenario hydrographs in WMS 11.1 today!

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