Introductory Exercises for GIS Using ArcMap & ArcCatalog

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The new, clipped hydrography layer will be added to the table of contents automatically and willbe displayed in the map view.Repeat this procedure for the roads and soils layer.You now have 4 data layers just for Middlefield: the town boundary, hydrography, roads, andsoils.Rename the new layers to: Middlefield Town, Middlefield Hydrography, Middlefield Roads, andMiddlefield Soils (see earlier instructions if you forgot how to do this).Creating DataThere will inevitably be occasions where the data you want is not available because it has never beencreated. ArcCatalog and ArcMap allow you to create your own shapefiles through a process called onscreendigitizing.In the map display, turn on the Middlefield Town and Middletown Quad layers. Click on thezoom in iconand drag a box around the designated area as shown below.Adjust your window so that you can see Beseck Lake as displayed below. You may need to turnoff layers other than “Middletown Quad” to see the DRG labels.14
There are several lakes found throughout Middlefield. Using ArcMap’s on-screen digitizing capabilitiesyou will digitize, and therefore create, a shapefile of this lake.However, before we can add new features, we must create a new shapefile to store those features. Wecan create new shapefiles in ArcCatalog.Open ArcCatalog and navigate to your GIS folder. Highlight the folder in the left-hand display.From the “File” menu, select “New”, then “Shapefile”. A dialog box will appear where you willset the attributes of the new shapefile.Name the new layer “Lakes” under “Name:”Lakes are typically (and logically) represented by polygon features. Select “Polygon” from thedropdown list for “Feature Type”The spatial reference should be set to match the layer that we are digitizing features from. In thiscase, we are digitizing lakes from the Middletown Quad, which is stored in NAD 27 CT StatePlane. Set the new “Lakes” shapefile to have this same spatial reference (refer to your earlierinstructions if you need a reminder on how to do this)Click “OK” to create the new file according to your specificationsClose ArcCatalog15
Page 1 and 2: Introductory Exercises for GIS Usin
Page 3 and 4: Now scroll to the section labeled
Page 5 and 6: Using ArcCatalogArcGIS shapefiles c
Page 7 and 8: Click “Add”, then “OK, then
Page 9 and 10: Navigate to the correct directory a
Page 11 and 12: Notice that ArcMap asks whether you
Page 13: In the toolbox window, select “Co
Page 17 and 18: Click on the edge of Beseck Lake in
Page 19 and 20: Part II: Locating Prime Farmland in
Page 21 and 22: Prime Farmland Soils Prime Farmlan
Page 23 and 24: You have now located and effectivel
Page 25 and 26: Choose Aggregated Farmland and Buff
Page 27 and 28: You have now identified the most su
Page 29: Each element can be edited individu

Introductory Exercises for GIS Using ArcMap & ArcCatalog

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