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...source (GIS, CAD). The general coverage provides a way to examine feature objects when the attributes are uncertain or unknown. ...direction of the arc does not need to be considered. Later, these feature objects can be converted to other coverages or data types.

...this drainage coverage. Most of the work done will be centered around the drainage coverage which has two different purposes as outlined in the following para ...rainage polygon is tied into the tree as a drainage basin. An example of a drainage coverage used for the purpose of creating a hydrologic model is shown in th

...logic models to be built directly from three different features of the map module: polygons representing basin boundaries, arcs representing a stream network ...at the proper scale so that lengths and areas determined from the feature objects are correct, or simply used as a scaled schematic representation of the wat

...leExample.png|thumb|250 px|Examples of arcs drawn over DEM data in the Map module]] ...ular set of information. For example, one coverage could be used to define drainage boundaries, and another coverage could be used to define [[WMS:Land Use Cov

One of the most common methods for creating feature objects is to import a shapefile. The concept of a shapefile was established by Env ...file is a standard database file and stores the attributes of the feature objects. Finally, there will be a *.shx file which is an indexing file. There may b

[[File:WMSIcon Drainage Palette.png|thumb|right|The toolbar for the Drainage module.]] ...has a variety of tools useful for editing and creating objects within that module. The tools are described below.

...nts, lines, polygons) that overlay the study area and map those to feature objects in a map coverage. ...udy area to be mapped. (This is done with the selection tool(s) in the GIS module) If wanting to map all features, choose the '''Select All''' command from t

...tte'' change to the set of tools associated with the selected module. Each module has a separate set of tools. ...the command. For example, to delete a set of triangles in the Terrain Data module, the '''Select Triangles''' tool is chosen, the set of triangles to be dele

;5.3. Terrain Data Module :[[WMS:Terrain Data Module|Terrain Data Module]]

...'TIN'' or ''DEM'' Drainage module menus, or in the ''Feature Objects'' Map module menu. If a TIN, DEM, or map data are not present, areas and slopes must be

...nd (located in the ''DEM'' menu in the Drainage module) is used to create feature arcs from DEM points whose flow accumulation areas are above a defined thre ...et points to the closest threshold cell when creating them in the Drainage module). The ''Flow Accumulations'' display option can be very useful for identify

...S:Help Menu|''Help'']]). The remaining menus are dependent on the selected module. ...n right-clicking in the Project Explorer or when right-clicking on feature objects.

One common method for creating feature objects is to import a shapefile. The concept of a shapefile was established by [ ...format. When they are imported into SMS, the data is converted to feature objects, points, arcs, or polygons. Shapefiles are opened through ''File'' | '''Op

...terpolated from the background elevation map for TIN vertices created from feature arcs vertices. ...'' | '''...to TIN''' command found in the ''DEM'' menu of the Terrain Data module. In other words, it is possible to read in portions of the DEM and interpol

...computed by overlaying either triangles on a TIN or basin polygons (from a drainage coverage) divided into small squares with the GIS data to calculate an Fm a # [[WMS:Mapping to Feature Objects|Map GIS data to feature objects]], if necessary

...and another coverage could be used to define land use or soil zones. These objects could not be included in a single coverage since polygons within a coverage ...rage. New feature objects are always added to the active coverage and only objects in the active coverage can be edited. The figure below shows several covera

File:WMS TerrainIcon.svg|Terrain Data Module File:Drainage Module Icon.svg|Drainage Module

...'TIN'' or ''DEM'' Drainage module menus, or in the ''Feature Objects'' Map module menu. If a TIN, DEM, or map data are not present, areas and slopes must be ...and in the TIN or DEM Drainage module menus, or in the Feature Objects Map module menu.

...DEMs. The ''General'' tab has a few things that do not fit as part of any module such as the background color, the color used to contrast selections (XOR), ...Colors|polygon]] in the currently selected color depending on the type of feature. [[#Changing Color|Colors can be changed quickly]] by selecting the drop-do

The ''Feature Objects'' menu has the following commands: The '''Delete''' command will delete all feature objects and any unsaved data.