ARCSCAN FOR ARCGIS TUTORIAL PDF

You can take any image, and you can vectorize it with ArcScan. Esri’s ArcScan; Autodesk Raster-to-Vector Conversion; Trimble Ecognition. Quick-start tutorial. • Exercise 1: Raster tracing. • Exercise 2: Batch vectorization. 2. ArcScan for ArcGIS software has the tools you need to convert your scanned. 3 ArcScan for ArcGIS Tutorial IN THIS TUTORIAL Exercise: Raster tracing Exercise: Batch vectorization ArcScan for ArcGIS software has the tools you need to.

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This process can be performed interactively or in an automated fashion. The easiest way to learn how to use ArcScan is to complete the exercises in this tutorial.

Exercise shows you how to set up the raster snapping options and environment, snap to raster cells, and trace raster cells to create line and polygon features. Exercise teaches you how to edit a raster layer to remove unwanted cells, apply vectorization settings, preview the vectorization, and generate features using the batch vectorization mode. Each of these exercises takes between 5 and 0 minutes to complete. You have the option of working through the entire tutorial or completing each exercise one at a time.

Raster tracing ArcScan makes it easy to create new features from scanned raster images. This process can significantly reduce the time it takes for you to incorporate raster data into your vector database. In this exercise, you will generate features from a scanned parcel map by interactively tracing raster cells. You will begin by starting ArcMap and loading a map document that contains the raster dataset and two shapefiles.

Starting ArcMap Before you can complete the tasks in this tutorial, you must start ArcMap and load the tutorial data. Double-click a shortcut installed on your desktop or use the Programs list in your Start menu to start ArcMap. Click the Open button on the Standard toolbar. You will change the raster symbology from stretched to unique values. In the Show box, click the Unique Values display option. Creating a bookmark for areas that you visit frequently will save you time.

For information on how to create and manage spatial bookmarks, see Using ArcMap. You will now zoom to a spatial bookmark created for this exercise. Click the View menu, point to Bookmarks, and click Trace lines to set the current view to the edit area of the exercise.

When the display refreshes, you should see the trace area. The Start Editing command enables you to begin an edit session. Click the Editor menu and click Start Editing to begin the edit session.

Set the maximum line width value to 7. This setting will ensure that you are able to snap to raster cells that represent the lot boundaries. Setting the raster snapping options Raster snapping requires settings that influence the behavior of the tracing.

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These options are set in the Raster Snapping Options dialog box. Click the Editor menu and click Snapping to open the Snapping Environment dialog box. Creating line features by tracing raster cells Now that you have set up your raster snapping environment, you are ready to begin tracing the raster cells.

You will use the Vectorization Trace tool for this step. Click the Vectorization Trace button on the ArcScan toolbar.

Move the pointer until it snaps to the intersection of the lot boundaries and click to start tracing Click the plus sign next to Raster to expand it. Check the Centerlines and Intersection options for raster snapping. Point the Vectorization Trace tool downward and click to start creating the line feature. Once you have finished tracing around the lot boundaries, press F to finish the sketch.

Continue to point and click with the Vectorization Trace tool to trace the exterior boundary of the lots. A line feature now represents the exterior boundaries of the scanned parcel lots. To get a better view of the area that will be traced, you need to zoom to the bookmarked extent called Trace polygons. Click the View menu, point to Bookmarks, and click Trace polygons.

Click the Vectorization Trace button on the ArcScan toolbar. Move the pointer until it snaps to the lower-left corner of lot 06 and click to start tracing.

Changing the edit target layer You must change the edit target layer from ParcelLines to ParcelPolygons to create polygon features when tracing. Click the Target dropdown box on the Editor toolbar and choose ParcelPolygons. Point the arrow toward the lower-right corner of the lot and click to start creating the segments of the polygon feature.

When the cursor has returned to the starting point of the trace, press F to complete the polygon. Continue to trace the lot boundary in a counterclockwise direction. Click the Editor menu and click Stop Editing. In this exercise you learned how to set the raster snapping options and environment, snap to raster cells, and trace raster cells to create new line and polygon features.

These steps covered the main components of the raster tracing process. The next exercise will show you how to edit a raster layer and automatically generate features for an entire raster layer using the batch vectorization tools.

Click Yes to save your edits. Batch vectorization In this exercise, you will edit a scanned parcel map to remove cells from the raster that are not in the scope of the vectorization.

Once the raster has been cleaned up, you will generate features using the batch vectorization mode. Starting ArcMap and beginning editing Before you can complete the tasks in this tutorial, you must start ArcMap and load the tutorial data.

Navigate to the ArcScanBatch. Click the Symbology tab on the Layer Properties dialog box. Locating the cleanup area Spatial bookmarks are named extents that can be saved in map documents. Click the View menu, point to Bookmarks, and click Raster cleanup to set the arcsca view to the edit area of the exercise. Click the Editor menu and click Start Editing to begin the edit session. Cleaning fof the raster for vectorization When performing batch vectorization, it is sometimes necessary to edit the raster image prior to generating features.

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This process is referred to as raster cleanup and involves the removal of unwanted cells from the raster image that are not in the scope of the vectorization. ArcScan provides the tools to perform raster cleanup. You will now use the Raster Cleanup tools to remove unwanted text from the ParcelScan image.

Click the Raster Cleanup menu and click Start Cleanup to start the raster cleanup session. Click the Erase tool located on the Raster Painting toolbar. Continue to erase the text with the Erase tool until it has been completely removed from the image Click and hold down the left mouse key and erase the text located at the top of the parcel lot.

In addition to the Erase tool, the Raster Painting toolbar supports another tool designed to erase cells. This tool is called the Magic Erase tool, and it allows you to erase a series of connected cells by simply clicking or dragging a box around them. Click the Magic Erase tool located on the Raster Painting toolbar. Drag a box around the text located in the center of the parcel lot to remove it.

Using the cell selection fot to assist with raster cleanup In the previous steps, you learned how to use the Erase and Magic Erase tools to remove unwanted cells from the raster image.

However, if the image you are working with requires much cleanup, these techniques could be time consuming. To help streamline this process, you can use the cell selection tools in conjunction with the raster cleanup tools.

To get a better view of the edit area, you need to tutorual to the bookmarked extent called Cell selection.

Click the View menu, point to Bookmarks, and click Cell selection. The text is now removed from the raster.

In the Select connected cells dialog box, enter a value of for the total area of raster pixels. This expression will select all the cells that represent text in srcscan raster. The selected cells are now erased. These settings influence the geometry of the generated features.

These settings may vary depending on the type of raster data you are working with. Once you have determined the appropriate settings for your raster, you can save them within the map document or argcis a separate file.

Exercise 1: Interactive vectorization

You will use the Vectorization Settings dialog box to apply the settings. Click the Vectorization menu and click Vectorization Settings to open the Vectorization Settings dialog box. Previewing the vectorization ArcScan tutorisl a way to preview the batch vectorization prior to generating features.

This can help you save time by allowing you to see how the settings will affect the vectorization.

When the settings are changed, the preview can be updated by clicking the Apply button located on the Vectorization Settings dialog box.

This design allows you to fine-tune the vectorization settings.

ArcScan for ArcGIS Tutorial – PDF

Click the Vectorization menu and click Show Preview. The Generate Features dialog box allows you to select the vector layers that will store the new features and execute the vectorization. Click the Vectorization menu and click Generate Features.