Remote Sensing in an

Transcription

1 Chapter 5: Repairing a Data Address Remote Sensing in an ArcMap Environment Remote Sensing Analysis in an ArcMap Environment Tammy E. Parece Image source: landsat.usgs.gov Tammy Parece James Campbell John McGee NSF DUE ; This workbook is available online as text (.pdf s) and short video tutorials via:

2 The project described in this publication was supported by Grant Number G14AP00002 from the Department of the Interior, United States Geological Survey to AmericaView. Its contents are solely the responsibility of the authors; the views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Government. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Government.

3 The instructional materials contained within these documents are copyrighted property of VirginiaView, its partners and other participating AmericaView consortium members. These materials may be reproduced and used by educators for instructional purposes. No permission is granted to use the materials for paid consulting or instruction where a fee is collected. Reproduction or translation of any part of this document beyond that permitted in Section 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner(s) is unlawful. Introduction: ArcMap is a display mechanism. When you add data, you are only displaying the data in the map document window. The actual data file is still located in the file folder on your computer s hard drive or USB. When you save a map document, it says the data as displayed but also records the location of your data files. If you move the data files, ArcMap will not know where to find them, and when you open a specific map document, your display will be empty. You can fix this (repair the address) without rebuilding your map document. Repairing the Data Address Again, the files shown in the Table of Contents of your map document are not in your map file. They are still located in the file folder where you saved them on your computer. If you look at the address under Layers in the Table of Contents, it shows the reference link as to where your files are located. You can have files located in several different locations all in the same map document. ArcMap only saved the location of your files, not the data within the map document. 23 P age

4 If you see red exclamation points next to your layer names when you open your map document, this means that ArcMap cannot find your data layers. This can happen with both vector and raster files. You will need to repair the data location s address. 24 P age

5 To repair the address, right click on any of the layers in the Table of Contents, go to Data and Repair Date Source. This will take you to the Browse for Folder window, so you can navigate to the folder where your data is currently located. Click on the file that corresponds to the layer that you clicked on in the Table of Contents (note if you click on the wrong file, it alters the file that is in the map document and you will have to rebuild your map document!!). If all of your data is located all in the same place, all layer 25 P age

6 connections should be repaired. If your data is located in multiple places, you will need to do the repair this for each location. If the file is a raster file, when you click on Repair Data Source, you will get this dialog box. Click on the button at the end of the row for your file name and you will get the Browse for Folder window and can then navigate to the file folder where your data is located. Click on the file that corresponds to the file in the Table of Contents and click OK. Once you have repaired all the addresses, SAVE your map document. Your map should now display correctly. But you are not yet finished! One final step. Left click on File, and then click on Map Document Properties. 26 P age

7 Click on the box next to Store relative pathnames to data sources. Click OK. You are ready to proceed to the next tutorial. 27 P age

8 Notes: 28 P age