User manual TRIMBLE GPS ANALYST 2.30 GETTING START GUIDE REV A

[. . . ] getting started guide Trimble GPS Analyst extension TM GETTING STARTED GUIDE Trimble GPS AnalystTM extension Version 2. 30 Revision A October 2010 F Trimble Navigation Limited 10355 WeEsristmoor Drive Suite #100 Westminster, CO 80021 USA www. trimble. com Legal Notices Copyright and Trademarks © 2004-2010, Trimble Navigation Limited. For STL support, the software uses the Moscow Center for SPARC Technology adaptation of the SGI Standard Template Library. Copyright © 1994 Hewlett-Packard Company, Copyright © 1996, 97 Silicon Graphics Computer Systems, Inc. , Copyright © 1997 Moscow Center for SPARC Technology. Trimble, the Globe & Triangle logo, GeoExplorer, GPS Pathfinder, Juno, Nomad, Recon, and Yuma are trademarks of Trimble Navigation Limited, registered in the United States and in other countries. [. . . ] GPS positions are not affected by the resolution of the spatial domain for the geodatabase. If the spatial domain is too large, GIS features will be stored with less precision than their underlying GPS positions. This does not affect the quality of your data, but it can cause inaccuracies in the ArcMap display. To minimize map display discrepancies between GPS positions and GIS features, choose an appropriate spatial domain for the geodatabase. You cannot change the spatial reference for a GPS-enabled geodatabase without deleting all its GPS data, so you need to define carefully the area to be mapped at the start of a project. For more information, search for the topic Setting the spatial reference for the geodatabase in the Trimble GPS Analyst Extension Help. Selecting a geographic transformation Because GPS data always uses the WGS-84 coordinate system, you need to specify a geographic transformation if the geodatabase is using any coordinate system except WGS-84. This enables the ArcGIS Desktop software to project the GPS data into the correct coordinate system. ArcGIS often provides different transformations for different areas in the same coordinate system. For example, there are separate NAD-83 to WGS-84 transformations for the continental US, Hawaii, and Alaska. There may also be several transformations for the same location, for example if the transformation has been revised over time. Step 2: Extract data from the geodatabase for updating There are two ways to extract existing data from a GPS-enabled geodatabase for updating in the field. The method you select depends on the type of data collection software that your field crews will be using to update the data. For ArcPad and the GPScorrect extension If your field crews will be using Esri ArcPad software and the Trimble GPScorrect extension for ArcPad to update the data, use ArcMap to open a map document containing the feature classes you want to update. Use the Get Data for ArcPad button or the Get AXF Data for ArcPad button on the Trimble GPS Analyst toolbar in ArcMap to check out the feature classes from the geodatabase to ArcPad. Then, use Microsoft ActiveSync technology or the Windows Mobile Device Center to transfer the shapefiles to a field computer running ArcPad software and the GPScorrect extension. 46 Trimble GPS Analyst Extension Getting Started Guide Typical GPS Analyst Tasks 4 For Trimble data collection software If your field crews will be using Trimble data collection software such as the TerraSync software to update the data, export feature classes from the geodatabase as SSF files using the Export to Trimble SSF command in ArcCatalog. Then, use the Trimble Data Transfer utility provided with the GPS Analyst extension to transfer the SSF files to a field computer running the Trimble data collection software. B Tip ­ For information about how to install the Data Transfer utility, see Installing the Data Transfer utility, page 28. For more information about using the Data Transfer utility, refer to the Data Transfer Utility Help. Step 3: Add GPS and GIS data to the geodatabase The method you use to add GPS data to the geodatabase depends on the type of data collection software that your field crews used to collect the data. Note ­ By default, ArcGIS 10 geoprocessing is executed in the background. To do this, in the main ArcGIS 10 menu, go to Geoprocessing Tools / Background processing and then clear the Enable checkbox. If your field crews used Esri ArcPad software and the Trimble GPScorrect extension for ArcPad to collect the data, there are three ways to add the data to the geodatabase: · If the field crews were updating data that you checked out of the geodatabase using the Get Data for ArcPad button on the Trimble GPS Analyst toolbar in ArcMap, you must check in the data using the Check In ArcPad shapefiles and GPScorrect SSF button in ArcMap. If the field crews were updating data that you checked out of the geodatabase using the Get AXF Data for ArcPad button on the Trimble GPS Analyst toolbar in ArcMap, you must check in the data using the Check In ArcPad AXF file and GPScorrect SSF button in ArcMap. If the field crews were collecting new data that has not yet been added to the geodatabase, you must import the data using ArcCatalog. · · Each method for adding GPS data to the geodatabase is described below. [. . . ] The schema defines the tables, the fields in each table, and the relationships between fields and tables. A vector data storage format developed by Esri for storing the location, shape, and attributes of geographic features. A Shapefile is stored in a set of related files and contains one feature class. Arbitrary strength units used to determine the strength of a satellite signal. [. . . ]