v Importing Rasters SMS 11.2 Tutorial Requirements Raster Module Map Module Mesh Module Time minutes Prerequisites Overview Tutorial
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- Nigel Byrd
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1 v SMS 11.2 Tutorial Objectives This tutorial teaches how to import a Raster, view elevations at individual points, change display options for multiple views of the data, show the 2D profile plots, and interpolate data to mesh. Prerequisites Overview Tutorial Requirements Raster Module Map Module Mesh Module Time minutes Page 1 of 9
2 1 Introduction A raster consists of a matrix of pixels or cells stored and displayed in a grid formation (rows and columns). Each cell contains a value representing a type of information such as temperature or elevation. Rasters can be digital aerial photographs, images from satellites, scanned digitized pictures or even scanned maps. In this case, the raster that will be used is a surface map containing elevation data. However, rasters can also be used as base maps (usually scanned maps and images or satellite imagery) and thematic maps (usually containing information about land use and soil maps). 2 Loading the Raster To start, load a Digital Elevation Model (DEM) file as a raster. This DEM file contains elevation data that can be viewed and processed in SMS. To open a raster in SMS, 1. Select File Open. A dialog should appear. 2. In the Open dialog, Browse to the folder named: data files of the raster tutorial. This folder will be in the same location as all the other SMS tutorial folders that were downloaded when installing SMS. 3. Select the raster file named glenwood.asc and click Open. 4. A dialog will ask: Load it as raster or scatter: Select Raster to open the file. Some users may have to wait a few seconds depending on the computer being used. Once the file is open, the data should like Figure 1. Page 2 of 9
3 Figure 1 Raster 5. Zoom in on an area of the Raster using the Zoom tool on the side bar. While zooming in, notice how the image becomes pixilated. Each pixel will be a cell containing elevation data. 2.1 Elevations As mentioned previously, a raster is a set of pixels or cells each containing data. In this case, each cell contains an elevation as data. In order to view individual elevations at selected cells do the following steps. 1. Select the raster glenwood.asc in the Project Explorer to make it active. 2. Using the Select Point tool, select a random point of the data. Each cell has a location (X and Y) and an elevation (Z). These values are displayed below the menu bar in the X, Y and Z fields. 3. As selecting different points, see how those values changes. Page 3 of 9
4 3 Changing the Display As the data is being displayed in planar view, it is hard to see the different elevations. SMS offers two different ways to view raster data. The data can be displayed as a Raster in blockfilled contours (which is shown in Figure 1) and as a surface. In order to change the display of the data, 1. Select Display Display Options or select the Display Options icon. This will open the Display Options dialog. 2. In the dialog, if it is not already selected, click on Raster in the menu bar on the left side of the dialog. 3. Notice how the data is current set as Displayed as raster. Select the toggle Display as surface to turn it on. 4. Toggle on Contours under Display as surface. 5. Select the tab Contours. 6. Change the Contour Method to Linear. 7. Change the Line Thickness to Click on the Color Ramp... button to open the Color Options dialog. 9. Right now, the contours are being displayed in the Hue ramp under Palette Method. Select the Intensity ramp. This palette method will make it easier to view the elevations. Notice that users can change the color of this palette desired. Currently leave everything as default. Click OK in the Color Options dialog. 10. Select OK in the Display Options dialog. 11. The data will now be displayed in hues of green. Using the Rotate tool, rotate the data. 12. Users can also change the z magnification in the Display Options dialog. Select Display Display Options once more and this time select General from the side menu. 13. Under Drawing Options, toggle off Auto z-mag. After turning off the auto z- magnification, the user defined Z magnification will be displayed. Change this Page 4 of 9
5 number to 2.0 and click OK to apply changes and exit dialog. 14. Using the Rotate tool, rotate the data to view in 3D. To return to planar view, select the Plan View macro. 15. For the remainder of the tutorial, change the contour display to a color fill. Do this be opening the Display Options dialog again. 16. In the Raster display options, switch back to Display as raster. 17. Select OK in the Display Options dialog. 4 Editing the Projection 5 2D Profile Plot In order to create a profile plot as will be done in the next step, we need to set both the display projection and object projection so the object does not have a floating projection. To do this: 1. Click Display Projection. The Display Projections dialog should appear. 2. Make sure the Horizontal projection is set to No Projection, then click OK. 3. Then right-click on the Area Property coverage and select Projection. 4. In the Object Projection dialog, click OK to set the object projection. SMS can show 2D profile plots using the Observation coverage. In this section, we will show how to do so. 1. In the Project Explorer, right-click on the Area Property coverage under Map Data. Select Rename from the menu and change the name to Observation. 2. Right-click on the coverage and select Type Generic Observation from the menu. 3. Click on the coverage once more to make sure it is the active coverage. 4. Using the Create Feature Arc tool, create two arcs as shown in Figure 2. Create the arcs starting on the left side of the raster and ending on the right side. Page 5 of 9
6 Figure 2 Observation Arc 5. After creating the arcs, select Display Plot Wizard. This will open up the Plot Wizard. 6. Choose Observation Profile as the Plot Type. Click on the Next button to proceed to step 2 of the wizard. 7. Under the section Coverage, select which observation arcs to display in the plot. In this case, leave both arcs turned on. 8. Change the Plot tolerance to 5.0 m. The plot tolerance allows for points to become clearer in the plot as it puts a tolerance on how many points can be displayed. 9. Click Finish to display the profile plots. Notice the two different plots one for each arc. The plots window will be displayed at the top and the graphics window on the bottom. Users may choose to maximize one window and minimize another one to better view either window. Page 6 of 9
7 Figure 3 Profile plot for arcs 10. Using the Select Feature Point tool, select one of the nodes of either arc. 11. Drag the node around over the raster data. Notice how the plot will change as while moving and releasing the nodes. 12. You may open the Data Options (step 2) of the Plot Wizard again by right-clicking on the plots and selecting Plot Data from the menu. 13. Change the Plot tolerance to 1.0 m and Click OK. Notice how the points displayed on the plots are now denser because the tolerance was reduced. 14. Close the Plot 1 window and maximize the graphics window. 15. Click on the Frame macro to frame the data. 6 Raster to Mesh Interpolation The Raster data can also be interpolated to mesh. Meshes are used in SMS for modeling. 6.1 Creating Mesh Page 7 of 9
8 The first step to creating the mesh is to create a mesh coverage and providing mesh boundaries. 1. Right-click on Map Dat a in the Project Explorer and select New Coverage from the drop down menu. 2. In the New Coverage window, select Generic 2D Mesh as coverage type. 3. Under Coverage Name enter Generic 2D Mesh and click OK to create the coverage. 4. Click on the newly created coverage to make it active. 5. Using the Create Feature Arc tool click out an arc as shown in Figure 4, making a loop enclosing most of the raster data. Include multiple vertices in each arc. Figure 4 Mesh boundaries 6. Once the arc has been created, select Feature Objects Build Polygons. This command will look for any enclosed arc loop and assign the enclosed area as a polygon. Page 8 of 9
9 7. Once the polygon has been made, click on the Select Feature Polygon tool. This tool will not be highlighted to use if no polygon exists. 8. Double- click in the polygon to open up the 2D Mesh Polygon Properties. Leave everything as defaulted and click OK. 9. Right-click on the coverage Gen2D Mesh and Convert Map 2D Mesh from the menu to create mesh. 10. Click OK in the 2D Mesh Options dialog. 11. Notice a simple mesh has been generated. 7 Conclusion 6.2 Interpolating Raster elevations to Mesh Now that a mesh exists, the can interpolate elevations to that mesh using the elevations stored as raster data. 1. Right-click on the raster folder in the project explorer titled glenwood and select Interpolate Interpolate to Mesh from the menu. 2. This will open up the Raster Interpolation dialog. At this point a user may change the New Dataset Name if desired. In this case leave it as raster_interp. 3. Toggle on Map Z and click OK in the dialog. 4. The raster elevations have now been added to the generic mesh. Depending on the number of vertices that were used in creating the arc in step 5 of section 6.1, the user may use the Rotate tool to view how the elevations were mapped to the mesh. Users may need to turn on Mesh Contours in the Display Options dialog to see how the raster elevations were interpolated to the mesh. This concludes the Raster tutorial. Users may wish to experiment some more of the features in SMS or may close SMS at this point. Page 9 of 9
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v. 10.1 WMS 10.1 Tutorial Learn how to delineate a watershed using the hydrologic modeling wizard Objectives Import a digital elevation model, compute flow directions, and delineate a watershed and sub-basins
Objectives Learn how to import and display shapefiles with and without ArcObjects. Learn how to convert the shapefiles to GMS feature objects.
v. 10.0 GMS 10.0 Tutorial Importing, displaying, and converting shapefiles Objectives Learn how to import and display shapefiles with and without ArcObjects. Learn how to convert the shapefiles to GMS
Learn how to delineate a watershed using the hydrologic modeling wizard
v. 11.0 WMS 11.0 Tutorial Learn how to delineate a watershed using the hydrologic modeling wizard Objectives Import a digital elevation model, compute flow directions, and delineate a watershed and sub-basins
This tutorial introduces the HEC-RAS model and how it can be used to generate files for use with the HEC-RAS software.
v. 12.3 SMS 12.3 Tutorial Objectives This tutorial introduces the model and how it can be used to generate files for use with the software. Prerequisites Overview Tutorial Requirements 5.0 Mesh Module
Workshop #1: Set Up Project File and RAS Mapper
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Tutorial 7. Water Table and Bedrock Surface
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This tutorial shows how to build a Sedimentation and River Hydraulics Two-Dimensional (SRH-2D) simulation. Requirements
v. 13.0 SMS 13.0 Tutorial Objectives This tutorial shows how to build a Sedimentation and River Hydraulics Two-Dimensional () simulation. Prerequisites SMS Overview tutorial Requirements Model Map Module
WMS 8.4 Tutorial Hydraulics and Floodplain Modeling Simplified Dam Break Learn how to run a dam break simulation and delineate its floodplain
v. 8.4 WMS 8.4 Tutorial Hydraulics and Floodplain Modeling Simplified Dam Break Learn how to run a dam break simulation and delineate its floodplain Objectives Setup a conceptual model of stream centerlines
v Editing Elevations DEM Basics Import, view, and edit digital elevation models WMS Tutorials Time minutes Prerequisite Tutorials None
v. 11.0 WMS 11.0 Tutorial Import, view, and edit digital elevation models Objectives Learn to import DEMs from an online database, set the display options for an imported DEM, and view and edit the DEM
Files Used in this Tutorial
Generate Point Clouds and DSM Tutorial This tutorial shows how to generate point clouds and a digital surface model (DSM) from IKONOS satellite stereo imagery. You will view the resulting point clouds
v SMS 11.2 Tutorial Overview Prerequisites Requirements Time Objectives
v. 11.2 SMS 11.2 Tutorial Overview Objectives This tutorial describes the major components of the SMS interface and gives a brief introduction to the different SMS modules. Ideally, this tutorial should
v SMS 12.2 Tutorial Import from Web Requirements None Time minutes Prerequisites None Objectives
v. 12.2 SMS 12.2 Tutorial Import from Web Objectives This lesson is designed to give an overview of with the Importing from Web option offered by SMS. This option connects SMS to a web based program that
Creating and Displaying Multi-Layered Cross Sections in Surfer 11
Creating and Displaying Multi-Layered Cross Sections in Surfer 11 The ability to create a profile in Surfer has always been a powerful tool that many users take advantage of. The ability to combine profiles
v MODPATH GMS 10.3 Tutorial The MODPATH Interface in GMS Prerequisite Tutorials MODFLOW Conceptual Model Approach I
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v Stratigraphy Modeling TIN Surfaces GMS 10.3 Tutorial Introduction to the TIN (Triangulated Irregular Network) surface object
v. 10.3 GMS 10.3 Tutorial Stratigraphy Modeling TIN Surfaces Introduction to the TIN (Triangulated Irregular Network) surface object Objectives Learn to create, read, alter, and manage TIN data from within
GMS Tutorials MODFLOW Conceptual Model Approach 2 Adding drains, wells, and recharge to MODFLOW using the conceptual model approach
GMS Tutorials MODFLOW Conceptual Model Approach I GMS 10.4 Tutorial MODFLOW Conceptual Model Approach 2 Adding drains, wells, and recharge to MODFLOW using the conceptual model approach v. 10.4 Objectives
MODFLOW Regional to Local Model Conversion,
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Objectives Learn about the MODFLOW drain return package (DRT) interface in GMS and compare the package to the regular MODFLOW drain (DRN) package.
v. 10.3 GMS 10.3 Tutorial The MODFLOW drain return package Objectives Learn about the MODFLOW drain return package (DRT) interface in GMS and compare the package to the regular MODFLOW drain (DRN) package.
Watershed Modeling Maricopa Predictive HEC-1 Model. Watershed Modeling Maricopa County: Master Plan Creating a Predictive HEC-1 Model
v. 10.1 WMS 10.1 Tutorial Watershed Modeling Maricopa County: Master Plan Creating a Predictive HEC-1 Model Build a watershed model to predict hydrologic reactions based on land use development in Maricopa
Objectives Learn how free online map data can quickly and easily be used to dynamically update background maps and aerial photography in GMS.
v. 10.4 GMS 10.4 Tutorial Using free, dynamic, online map data in GMS Objectives Learn how free online map data can quickly and easily be used to dynamically update background maps and aerial photography
GMS 10.3 Tutorial MODFLOW Stochastic Modeling, Indicator
v. 10.3 GMS 10.3 Tutorial MODFLOW Stochastic Modeling, Indicator Simulations Use T-PROGS to create multiple material sets and run MODFLOW stochastically Objectives This tutorial teaches how to use the
v Mesh Editing SMS 11.2 Tutorial Requirements Mesh Module Time minutes Prerequisites None Objectives
v. 11.2 SMS 11.2 Tutorial Objectives This tutorial lesson teaches manual mesh generation and editing techniques that can be performed using SMS. It should be noted that manual methods are NOT recommended.
Objectives Learn how free online map data can quickly and easily be used to dynamically update background maps and aerial photography in GMS.
v. 10.3 GMS 10.3 Tutorial Using free, dynamic, online map data in GMS Objectives Learn how free online map data can quickly and easily be used to dynamically update background maps and aerial photography
Stratigraphy Modeling Horizons with Rasters Create solids from rasters using the Horizons Solids tool.
v. 10.1 GMS 10.1 Tutorial Create solids from rasters using the Horizons Solids tool. Objectives Learn what a raster catalog is and how it can be used to create subsurface models. Prerequisite Tutorials