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NHD Toolkit Training Workshop
Welcome to the NHD-Toolkit On-line Tutorials. The objectives of these lessons is to acquaint you with the functionality of the NHD Toolkit and give you the opportunity to use these tools in sample reach indexing situations. The tutorials assume you have basic familiarity with ArcView. Please contact OWSUPPORT 
if you have questions about the tutorials.
Set up
In order to do the tutorials, you need the following:
Unzip the contents of the NHDSampleData.zip file into a folder called "NHDSample_Data" in your local workspace.
Lessons
The NHD Toolkit tutorial includes 6 lessons. You can go through these Lessons on-line by clicking on the Lesson titles below or download the tutorial lessons in PDF format. The Lessons are designed to present background information helpful for using the NHD Toolkit. Detailed steps for the "hands-on" exercises using the sample data are contained in gray boxes.
In this exercise you will learn how to use the NHD Load/Unload Workspace extension while learning about the different components of an NHD workspace. You will also learn about linear referencing and how event tables can be displayed using the routes and measures in NHD. During the course of the exercise you will examine:
- The National Hydrography Dataset
- NHD Load/Unload Workspace
- The themes and tables in NHD
- Linear Referencing
- Displaying Surface water attributes via linear referencing
In this exercise you will learn how to create event tables georeferenced to NHD similar to the tables we used in Lesson 1. The NHD Reach Indexing Tool extension (NHD-RIT) automates the process of creating and editing point and linear event tables. It also allows you to georeference surface water data to the waterbody (polygon) features.
This lesson includes:
- Starting the NHD-RIT
- Creating a new event theme
- Reach Indexing Surface Waters as Linear Features
- Reach Indexing Point Features
- Indexing Waterbody Features
In this lesson, you will edit some NHD event/waterbody tables that have already been created. Existing event/waterbody tables may be obtained from another agency, or you may have downloaded them from the web. As you work through the exercises you will learn to use several of the editing tools available in the NHD-RIT. This lesson examines:
- Bundled Event/Waterbody Table
- Adding Existing Event Tables to a Project
- Using an ID List
- Editing the Surface Waters in an Event Theme
- Modifying the Spatial Extent of Events
- Adding Linear Events Using NHD Navigate
- Copying Events and Using Offsets
- Deleting Events
- Metadata and Transaction files
- Export Bundled Files
This lesson gives you the opportunity to use the skills you've obtained during the other lessons. It contains a list of sample TMDL's for you to reach index. While you are not given step by step instructions, you are provided with clues about which tools you might like to use. If you get stuck, refer to Lessons 2 and 3, or the NHD Toolkit Users Guide.
In this exercise you will use the NHD Arc2Shape extension that is part of the NHD Toolkit to convert an NHDinArc workspace to NHDinShp format. One of the benefits of using NHD Arc2Shape is that it allows you to project a geographic NHDinArc workspace in to another projection using ArcView. The resulting collection of NHD shapefiles is compatible with all of the NHD Toolkit extensions, including the NHD-RIT.
The NHD-RIT has a feature that allows you to convert existing surface water coverages in to NHD events. You can convert point, line and polygon features. In this exercise you will convert an existing surface water coverage to NHD events and QA/QC the results.
In this lesson, you will use ODBC connectivity to link your ArcView project to data stored in an Access database. Note: You may not be able to complete this exercise if you computer does not have the Access ODBC driver.
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