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Editing in ArcMap Workshop 9 Many times the data that you need for your analysis will not be ready made for you In some cases you might be the first person interested in some spatial feature that is found only in printed maps or perhaps you are trying to determine how some not yet built feature might affect the landscape you are interested in In these cases you are likely to have to create your own features from scratch Or you might need to alter or add to already existing data that may not have been updated recently If any of these are the case you will need to be familiar with editing in ArcMap This tutorial will walk you through the very basic skills you will need to proceed with editing in ArcMap There are many ways to interact with data in the ArcMap Editing Environment and this tutorial will introduce you to only the very simplest tools Getting Ready for the Tutorial 1 Browse to the Map Collection website at http www library yale edu maps 2 Under QUICK LINKS follow the Download GIS Workshop Materials 3 Scroll down to the Editing in ArcGIS workshop materials and click on the Data link to download the materials 4 Download the Data file to an initials folder a folder with your initials as the folder name in the C Temp folder of your harddrive 5 Unzip the contents of the file to the initials folder Creating an Empty Shapefile 1 Browse into the resulting folder 09 Editing in ArcMap Data and find the map document New Haven Sanborn Editing mxd and open it by double clicking 2 Click on the ArcCatalog to launch ArcCatalog Button 3 In the TreeView of ArcCatalog browse to the Data Shapefile folder of the tutorial dataset 1 4 Right click on the Shapefile folder and select New Shapefile to open the Create New Shapefile Dialog Box 5 Name the new shapefile Hydrants New Haven 1901 6 Leave the Feature Type as Point 7 Click on the Edit button under the Spatial Reference Description to open the Spatial Reference Properties Dialog You will use the spatial reference from a shapefile in the tutorial dataset to reference this data 8 Click on the Import Button to browse to the Data Shapefile folder and select the Wall York Grove High New Haven 1901 shapefile 9 Click Add 10 Click OK to accept the imported Spatial Reference Properties 11 Click OK to create the new shapefile Add Attribute Fields to Fire Hydrants Point Shapefile 1 In ArcCatalog Right Click on the new Hydrants New Haven 1901 shapefile and open the Properties Dialog 2 Select the Fields Tab 3 Click in the first blank Field Name cell to place the cursor Name the field HYD TYPE 4 Click in the Data Type cell next to the new HYD TYPE Field Name to activate the dropdown menu Select Short Integer as the Data Type 2 5 Click OK to write the new field to the empty Hydrants New Haven 1901 shapefile Drawing Features in an Empty Shapefile The Editing Toolbar 1 Return to ArcMap and use the Add Data Button to add the empty Hydrants New Haven 1901 shapefile to the map document 2 Click on the Editor Toolbar Button to open the Editor Toolbar Dock the toolbar somewhere convenient if necessary 3 Click on the Editor Button and select Start Editing to begin an editing session 4 Make sure that the Task is set to Create New Feature and the Target is set to Hydrants New Haven 1901 5 Use the Zoom Pan Tools to focus on the upper right corner of the scanned map image in the map document 6 Click on the Sketch Tool on the Editor Toolbar to enable it 7 Click on the D H Double Hydrant symbol to place a point on it 3 8 Click on the Attributes Button to open the Editor Toolbars Attributes Window 9 Place the cursor in the Value cell for your HYD TYPE field Place a value of 2 in the cell since you have digitized a doublehydrant 10 Repeat Steps 5 9 for the remainder of the hydrants in the extent of the Wall York Grove High New Haven 1901 layer until you have digitized points and edited the HYD TYPE field for all of the hydrants there are 6 Right click on the layer in the Table of Contents and select Zoom to Layer to zoom to its extent 11 When you have finished digitizing all 6 hydrants click Editor Save Edits on the Editor Toolbar 12 Save your work Creating New Polygon Features Create Printshop at 351 York Street 1 In the Target Dropdown on the Editor Toolbar change the target layer to the Wall York Grove High New Haven 1901 layer 2 Select the Sketch Tool from the Editor Toolbar and place the first vertex of the new polygon by clicking once on any of the four corners of the Print Shop footprint 3 Place each subsequent vertices moving sequentially clockwise or counter clockwise by clicking once 4 on each of the footprint corners 4 When you have placed the fourth corner vertex right click anywhere in the map view and select Finish Sketch 5 If you do not already have the Attributes Editor open open it from the Attributes Button on the Editor Toolbar 6 Use the values shown to the right to fill in the attributes for the Print Shop 7 Select Editor Save Edits on the Editor Toolbar to save the new feature and its attributes to the shapefile permanently 8 Save your work Deleting Modifying Splitting Merging Features Deleting 246 Grove Street 1 In the Main Menu go to View Bookmarks 250 Grove Note that there is a feature that does not correspond to a building footprint present in the reference image 2 On the Editor Toolbar change the Task to Modify Feature 3 Activate the Edit Tool 4 Using the Edit Tool click once in the orphan feature to select it 5 Right click in the selected feature and select Delete 6 Select Editor Save Edits on the Editor Toolbar 7 Save Your Work 5 Split 250 Grove Street 1 On the Editor Toolbar go to Editor Snapping to open the Snapping Environment Panel 2 Check all three checkboxes next to the Wall York Grove High New Haven 1901 layer 3 Close the Snapping Environment Panel 4 Change the Editing Task to Cut Polygon Features and use it to 5 Activate the Editing Tool select the footprint polygon at 250 Grove Street and hover it 6 Activate the Sketch Tool near the undigitized line in the footprint of 250 Grove Street Notice how the tool sticks to the lines and vertices of the feature as you come within the snapping tolerance of the line 7 Use the Sketch Tool to create a new line that splits the feature between the two sections shown in the reference image 8 When you have placed the second vertex of the line right click and select Finish Sketch Note that the drawing flashes a little bit when you do this ArcMap has just Split …


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