Presentation on theme: "Working with Survey Data in ArcGIS CVEN 2012 – Geomatics University of Colorado – Boulder April 2006 Alyssa McCluskey."— Presentation transcript:
Working with Survey Data in ArcGIS CVEN 2012 – Geomatics University of Colorado – Boulder April 2006 Alyssa McCluskey
Topics Covered Benefits of integrating survey data and GIS data Workflow for integrating survey and GIS data Tools for loading survey data into a geodatabase. Managing survey data in ArcCatalog™ Computing and adjusting survey data in ArcMap™ Editing geodatabase features.
Background Assume you have used a TPS instrument to perform a survey You have downloaded the data from the instrument to your computer You now want the ability to use the data in your GIS
Making a Feature Survey Aware Survey-aware features can be linked to survey points without directly changing their position. This means you "track" the locations of survey-aware features as they are edited through the standard methods. They are linked to the survey points, so you can ultimately update their geometry to the survey point locations. Non-survey-aware features can also be edited by digitizing so they snap to survey points; however, these features are not "aware" of the underlying survey points to which they are snapped.
TPS Traverse Tool - Setup Contains the instrument setup name. (The Fixed field is checked if this is the traverse start point.) Shows other properties for that setup point Shows the start point’s instrument location Info about the TPS instrument
TPS Traverse Tool - Measurement Information recorded by the survey instrument during the survey. You imported this information In this tab you can choose the traverse setup points to review the measurements that were made from them, and set or review measurement orientation information.
TPS Traverse Tool - Measurement Different traverse computation methods The Compass rule, also known as the Bowditch rule, distributes the closure error in the Northings and Eastings in proportion to the distance along all the courses, from the first point to each of the unadjusted coordinate locations. The Transit rule assumes distances have no measurement error and distributes the error only through the directions and angles. The Crandall method distributes the error in the distances only, assuming directions and angles have no measurement error.
TPS Traverse Tool - Compute Now we have computed the buildings too. Notice that the buildings and point don’t exactly match. Establish a link between survey and building pts, move building and snap it to surveyed corner.
Completing Lab 3 Skip the video Adjust the corners of the 2 remaining middle buildings, create a map of the area with 2 additional data views of the corrected buildings Email or print certificate of course completion