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Published byGriselda Hart Modified over 8 years ago
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From AutoCAD to ArcView
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From AutoCAD to Arcview Purpose Display a site plan drawn in AutoCad on a view drawn in ArcView Given Campus site plan drawing based on an assumed origin with survey monuments ArcView view of the United States in geographic coordinates (degrees) Data sets of wetlands and aquifers in other coordinate systems
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From AutoCAD Given: Campus plan with assumed coordinate system Units are in feet Property line survey monuments are shown in New York State plane coordinate system Monument 1 Northing 1,129,290.14 Easting 761,886.75 Monument 25 Northing 1,133,064.73 Easting 758,358.74
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From AutoCAD Assumed: Campus map was in 1927 state plane coordinates, New York west Monument northings and eastings are in feet
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From AutoCAD Procedure Use AutoCAD world coordinate system Because AutoCAD user coordinate system did not translate to ArcView Use AutoCAD “move command” to move all the drawing elements from assumed coordinates to northing and easting coordinates Use AutoCAD “rotate command” To align drawing to true north and south
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From AutoCAD Procedure (continued) Save AutoCAD drawing As Campus.DWG Create and save a “world file” for ArcView to use when creating a theme of the Campus map Open text editor (notepad.exe) Anticipate bringing the campus map into an ArcView view already projected to State Plane 1927 New York,west
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From AutoCAD If the Campus map is on New York west and ArcView view is projected to New York west then the text file that coordinates between the two is: 0,0 0,0 This one line text file should be saved in the same folder as the AutoCAD drawing This file should have the same name as the AutoCAD drawing and a.wld extension In our example: Campus.wld
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In general terms Select a point with known coordinates in both the AutoCAD drawing and the new “shape file”. The.WLD (world file) will tell Arcview which point to line up. The concept: X 1,Y 1 = X 2,Y 2 The syntax: X 1,Y 1 X 2,Y 2 AutoCAD coordinates State plane coordinates “new Shape file” coordinates space
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Coordinate Transformation.WLD file holds the transformation information.WLD file is a text file.WLD file is in the same folder as the.DWG file.WLD file format is: X,Y newX,newY
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Example Locate the AutoCAD drawing of the campus of Monroe Community College in Monroe County, New York
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from AutoCAD
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Check assumed coordinate system origin
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from AutoCAD 0,0 is in the lower left corner of the map
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from AutoCAD Zoom in on monument 25 in lower left
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from AutoCAD Object snap helps to get right on the point
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from AutoCAD Use zoom extents to find the drawing after the move
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from AutoCAD Check coordinates to show move
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from AutoCAD Rotate using reference angle North straight up
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from AutoCAD Zoom in to monument 1 for reference angle end point
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Pick monument 1 as second point of reference angle Type in coordinates of monument 1 as the “new angle”
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from AutoCAD Zoom extents to find drawing rotated to true north Save
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WARNING For many ArcView users the most difficult aspect of working with data in a GIS environment is the concept of map projections.
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theme to geographic coordinates
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From AutoCAD to ArcView The AutoCAD drawing Is in state plane coordinates.wld file is in the same folder ArcView Placed in state plane projection Campus.dwg inported into ArcView view Campus saved as a theme Theme projected to geographic coordinates
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theme to geographic coordinates
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Turn on extentions
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theme to geographic coordinates For CAD Reader
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theme to geographic coordinates And Projection Utility Wizard
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theme to geographic coordinates
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Start a new view
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Theme to geographic coordinates Add the drawing as a theme
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theme to geographic coordinates
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Save the theme As a shape file Convert the saved shape file From state plane coordinates To geographic coordinates
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theme to geographic coordinates Start the projection utility from the “File” on the menu bar
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theme to geographic coordinates Sometimes it is hard to remember where the shape file was saved
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theme to geographic coordinates Specify the state plane coordinates
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theme to geographic coordinates Yes to save the coordinate info
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theme to geographic coordinates For the new system, click the geographic radio button
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theme to geographic coordinates Select no
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theme to geographic coordinates Make a note of the file location Pick a better file name
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theme to geographic coordinates
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Display the new theme over top of the old theme
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theme to geographic coordinates Or the new theme can be added the regular way
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From AutoCAD to Arcview To demonstrate Display Arcview view of the counties of United States Add the campus theme
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ArcView Add theme of campus on geographic coordinates
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ArcView Select campus map in geographic coordinates
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Arcview Theme needs to be clicked on
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Arcview Campus in geographic coordinates Next add other themes in geographic coordinates
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Arcview Check the values of the geographic coordinates
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Arcview Add the quadrangle wetlands, NY state aquifers, 50 states, and world themes
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Arcview Turn the themes on after reordering
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Arcview Campus theme should be on top
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Arcview The new world order
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Arcview Click the themes on Notice wetlands indicated on campus
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Arcview Use the zoom out button
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Arcview Aquifers Wetlands quad
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Arcview Zoom back
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Arcview Zoom back
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Arcview Zoom back
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Arcview Zoom back
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Arcview Change the coordinate system from geographic properties
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Arcview projection
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Arcview Change projections
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Arcview Scroll down
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Arcview Scroll down to the world from space
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Arcview Nice view, and it still contains the campus map
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Arcview Zoom way in
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Arcview And check the coordinaates
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Arcview Change units to feet
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Arcview And change coordinates to state plane 1927 New York, west
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Arcview Check coordinates Change units from meters to feet
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AutoCAD to ArcView Campus drawing in ArcView
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If none of this works.... Check to see if you turned on the extensions
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The end
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