WMS

Understanding Projections vs. Reproject

By aquaveo on December 18, 2019

Have you ever wondered what the difference between projection and reprojection is? Have you ever needed to convert a projection from one type to another in GMS, SMS, or WMS (collectively known as XMS)? The use of projections in WMS can be confusing, so the following should provide further clarification.

Specifying Projections

Projections can be associated with individual data objects, either in the object data file itself or in an associated *.prj file. If XMS cannot find a projection, the object will be left as "no projection," or, when new objects are created, XMS will assign the display projection to it. You can specify an object's projection by right-clicking on it and selecting Projection. Note that this projection must be the same as the original projection of the data; specifying an incorrect projection will result in data issues.

Reprojecting on the Fly

"Reprojecting on the Fly" occurs when datasets or objects from multiple projections are loaded into a project, where the x and y values would not otherwise overlap (i.e., the data would be displayed in two or more distinct locations). The different projections for these data will be "reprojected on the fly" to match the display projection such that the data objects will line up. Note that this does not change any *.prj files or the projections that are set for each object; it is an automatic function internal to XMS used for display purposes.

Converting a Projection

If you need to convert from one projection to another, this can be done by right-clicking on it and choosing Reproject. To use this command, the data must first have the correct projection specified. After choosing Reproject, the command will prompt the user to select a new projection, the data will be converted to the selected projection. If a *.prj file is associated with the object (such as a TIFF), reprojecting the object will change the *.prj file. Reprojection on the fly is usually sufficient for most applications. Please note that there are some limitations for reprojecting.

Reporject Dialog Example

Once the datasets are referencing their projection correctly, XMS should reproject them on the fly to match your display projection. If you don't have a display projection set, you can do so by selecting the Display menu and choosing Projection. At that point, if you would like to reproject your scatter(s) into the same projection as the display projection, you would be able to do so.

Now that you see the differences between projection vs. reproject try them out in XMS today!

Blog tags: 
GMS
SMS
WMS
XMS

Working with Large DEMs

By aquaveo on November 6, 2019

Do you have a project that requires using a large DEM? Digital Elevation Model files are a great source for terrain data in WMS. A lot of projects require using DEMs which makes it important to use the data available.

Using a large DEM file can present some complications in WMS. A large file may cause the program to slow down or have difficulty processing. So it is important to make certain to use a DEM that contains mostly relevant data and doesn’t contain an excess of nonessential information.

But how do you know if the DEM data you are pulling is enough? Is more watershed data always better?

Example of DEM in WMS with contours turned on.

Pulling in more data doesn’t insure better results. Though WMS is able to handle a massive amount of data (which is not a guarantee) the hardware in your computer may not be able to handle it. In general, a DEM twice the size of your watershed is probably sufficient for most models. More than twice your watershed size tends to just bog down the model causing you to face unnecessary wait times.

What should you do if your watershed data is not loading?

If your data is taking a long time to load try adjusting the resolution. After using the Get Data from Map tool, and making your selection in the Data Service Options dialog, you will be able to select your desired resolution in the Zoom dialog. Selecting a lower resolution zoom level should make the DEM easier to work with in WMS.

You could also try breaking up the DEM into multiple DEMs. That way your computer is not overwhelmed by trying to download one huge file all at once. Then while you’re working on your model you can turn on just the DEM(s) you need.

Third party software can be used to break up the DEM or reduce the resolution.

DEMs remain an excellent source for data for projects in WMS. Download WMS today!

Blog tags: 
WMS

Aquaveo User Conference 2019

By aquaveo on October 9, 2019

The 2019 Aquaveo User Conference is going on now. It started yesterday, October 8th, and will wrap up today, October 9th. We are enjoying meeting with users from around the world. In attendance are users from the United States, Germany, Portugal, South Africa, and other places around the globe.

At the conference, we announced some of the new features and upcoming changes to our products that we are excited about:

  • Making XMS functionality available for use outside of the traditional interface.
  • More web-based applications for portability and ease of access.
  • Simplifying and unifying tools so it is easier to find and use the functionalities available.
  • Project management tools to track the history of a model.
  • 3D bridge modeling in SMS.
2019 Aquaveo User Conference

Talking to those in attendance, we learned they enjoyed:

  • Learning more about software features and functionality.
  • Learning how to improve their model development process.
  • Discovering benefits of Aquaveo’s software over other software.
  • Talking to developers and learning tips for model development.
  • Being able to show off their models and receive feedback on them.
Eva Loch presenting at the 2019 Aquaveo User Conference

We’d like the thank the following for participating during our user conference:

If you couldn’t make it to the Aquaveo User Conference this year, watch our website and Facebook page for future conferences.

Blog tags: 
GMS
SMS
WMS
AHGW
CityWater

Tips for Finding Information on the XMS Wiki

By aquaveo on September 25, 2019

The Aquaveo XMS Wiki contains over 8000 pages of information and images about SMS, GMS, WMS, and other Aquaveo products (collectively called "XMS"). While we try to make the information as easy to find as possible, sometimes the sheer volume of available information can make a particular search term harder to locate. Here, we discuss a few ways to find the information you need using the XMS Wiki.

Help Button

Most dialogs in SMS, GMS, and WMS contain a Help button at the bottom of the dialog window. Clicking this button will generally take you directly to a page on the XMS Wiki about that dialog. This is the quickest way to find information about a dialog.

Navigation Links

When you visit any page on the XMS Wiki, an "XMS Projects" menu is found at the top left of the page. Click on any of the products listed there to be taken to the main page for that product. Once there, click on any of the links in the Wiki Sections section on the lower right to be taken to a table of contents listing all of the pages discussing the features of that product.

Example of the XMS Wiki

At the bottom of the main page for the product, there is also a navigation template listing main topics for that product. This allows you to quickly navigate to any of those main topics.

Search Field
Example of the XMS Wiki Projects menu

Directly below the "XMS Projects" menu is a search field. If you start typing in that field, the XMS Wiki will attempt to locate a page containing what you type. To find a page about a particular product, preface the search term with that product's abbreviation, followed by a colon and the search term. For example, if you are searching for information about the bridge scour features in SMS, type "SMS:Bridge Scour" and a list of articles will appear below the search box. Simply select the desired article to be taken directly to it.

You can also enter only the search term and select the "containing…searchterm", where "searchterm" is the term you entered in the search box. This will bring up a list of pages containing the term you entered. This can be useful when you don't know what the page might be named, but you know a term that might be used on that page.

Categories

At the bottom of every page on the XMS Wiki is a list of one or more categories. This provides another way to locate information on a given topic. Simply click on the category to find a list of pages, images, and additional categories related to that topic.

Google

One option that is often overlooked is to use the power of the Google search engine. To search for pages or information on the XMS Wiki, enter "searchterm site:xmswiki.com", replacing "searchterm" with the word or words you are seeking. This tells Google to provide results only from the XMS Wiki. Click this link for an example.

Page Prefixes

Most pages on the XMS Wiki are prefaced by a product abbreviation. When reviewing search results, make sure the page you are on has the appropriate abbreviation at the beginning of the page title (e.g., "SMS:Display Options", "GMS:Display Options", "WMS:Display Options"), as similar pages may be found for various products.

Page Notices

Sometimes when searching for information or a feature, you may find pages that document obsolete or future features. These pages will have notices at the top indicating this status. There are other types of notices that may appear at the tops of pages, as well, so always be sure to read any notices that appear.

Try out these search methods today by visiting the XMS Wiki today!

Blog tags: 
GMS
SMS
WMS

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