دانلود کتاب Lining Up Data in ArcGIS: A Guide to Map Projections

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Cover......Page 1
Contents......Page 4
Preface......Page 8
About the author......Page 10
Introduction......Page 12
Chapter 1 Identifying the type of coordinate system for data using ArcMap......Page 16
Using vector datasets......Page 17
Identifying the type of coordinate system for data using ArcMap......Page 18
Summary......Page 30
Chapter 2 Identifying the correct geographic coordinate system......Page 32
Example of datum offset between NAD 1927 and NAD 1983 datumsin a GCS......Page 33
Example in which data with the unknown coordinate system is in a GCS, and reference data is in a projected coordinate system......Page 41
Other issues to consider......Page 46
Summary......Page 49
Chapter 3 Identifying the projected coordinate system......Page 50
State plane coordinate system......Page 51
Universal transverse Mercator (UTM) coordinate system......Page 57
Testing to identify the projected coordinate system for data......Page 59
If state plane options do not align the data, test for UTM......Page 63
Other projected coordinate system options......Page 69
Summary......Page 70
Chapter 4 Applying nonstandard units—when standard coordinate systems don’t work......Page 72
Customizing the state plane coordinate system with units of inches......Page 73
Saving the custom projection file to disk for future use......Page 87
Summary......Page 89
Chapter 5 Aligning CAD data—modifying a standard coordinate system......Page 90
Working with CAD files in ArcMap......Page 91
1. Identifying units of measure......Page 93
2. CAD files created with references attached......Page 96
3. If CAD data is in nonrotated local coordinates......Page 97
4. Rotated CAD files......Page 100
6. If the CAD files were created in ground coordinates......Page 101
7. The scale factor may be applied to the false easting and false northing......Page 104
Saving the custom projection file to disk......Page 105
Summary......Page 106
Chapter 6 Aligning rotated CAD data......Page 108
Adjusting for the azimuth or rotation parameters......Page 109
Using other custom coordinate system options......Page 128
Summary......Page 130
Chapter 7 Analyzing geographic (datum) transformations and why we need them......Page 132
What are geographic transformations?......Page 133
Geographic transformation methods......Page 135
Creating and saving a custom geographic transformation in ArcToolbox......Page 142
Summary......Page 144
Chapter 8 Applying geographic transformations......Page 146
Applying composite geographic transformations in the ArcMap data frame......Page 147
Applying geographic transformations in the Project tool in ArcToolbox......Page 158
Summary......Page 161
Chapter 9 What map projection should I use for my project?......Page 162
Geographic coordinate systems......Page 163
Projected coordinate systems......Page 167
Deciding on the projection to use for your project......Page 172
Creating the custom projection file in ArcMap......Page 174
Appropriate use of the web Mercator projection......Page 179
Summary......Page 180
Chapter 10 Defining projections and their parameters; adding x,y data; analyzing the shape of buffers......Page 182
Coordinate system parameters......Page 183
What is a geographic coordinate system?......Page 185
What is a projected coordinate system?......Page 187
What is a local coordinate system?......Page 189
Adding x,y data to ArcMap and converting to features in a shapefile or geodatabase feature class......Page 190
Why buffers displayed in ArcMap are not round......Page 198
Summary......Page 211
Appendix A Knowledge Base articles......Page 212
Appendix B Default installation paths......Page 214
Appendix C Default user profile paths 201......Page 216
Further reading......Page 217
Data source credits......Page 218
Index......Page 220
Back cover......Page 232