Global Positioning System and GIS

Integrating GPS Data with ArcView (GPS and GIS) Part 1

OVERVIEW The Conversion Process for ArcView 1 The Trimble Pathfinder Office software generates ArcView shapefiles directly. While the process is somewhat simpler than that for creating coverages, all the caveats about being sure that datum, projection, coordinate system, and units are correct, apply equally. A note on the shapefile data structure: ESRI refers to the […]

Integrating GPS Data with ArcView (GPS and GIS) Part 2

See the Converted File in Arc View {__ } Start up ArcView. Make the window occupy the full extent of the screen. Create a new view. Under File click Extensions. If your list of available extensions includes 3D Analyst and/or Spatial Analyst put checks beside those names. OK the window. Figure 6-8. Results of a […]

Integrating GPS Data with ArcInfo (GPS and GIS) Part 1

OVERVIEW The Conversion Process for ArcInfo 1 Once you have determined the parameters of the coverage you want to convert your GPS data to, you are ready to undertake the actual conversion process. In the Step-by-Step section, I will lead you through the process, but here I want to point out what the output of […]

Integrating GPS Data with ArcInfo (GPS and GIS) Part 2

PROJECT 6b-A In November of 1993 the students and faculty of the Department of Geography at the University of Kentucky participated in a cleanup of the Kentucky River. They took a GPS receiver on their trek; the antenna was mounted on the roof of a garbage scow (originally built as a houseboat). One file they […]

Integrating GPS Data with ArcInfo (GPS and GIS) Part 3

Look at the GPS Track in the Context of a Variety of GIS Data The subject of this topic is using GPS for input to GIS. Now that you have GPS data in ArcInfo let’s look at it with other GIS data. We have avail able several digital maps and images of a portion of […]

Beyond the Basics (GPS and GIS) Part 1

IN WHICH you learn (a) how to collect attribute information about the environment simultaneously with collecting GPS position data, (b) how to plan for important GPS missions, (c) about differential correction that takes place immediately, and(d) how to navigate using a GPS receiver.1 OVERVIEW Attributes, GPS, and GIS Overheard: Global Positioning System? A system for […]

Beyond the Basics (GPS and GIS) Part 2

Three Linked Projects 7B, 7C, and 7D: Utilizing Feature Attribute Data The following three projects (7B, 7C, 7D) relate to obtaining and converting feature attribute information as well as position data. If you have a GeoExplorer receiver and Pathfinder Office software, and you want to collect data in the field, do all three projects. If […]

Beyond the Basics (GPS and GIS) Part 3

Make ArcView Shapefiles from the Feature-Types6 The primary difference is that, instead of getting just one shapefile (posnpnt.shp or posnline.shp) you will get several: • Not In Feature data will be in POSNLINE.SHP. • Streets will be in STREETS.SHP. • Rocks will not be represented as a shapefile since we didn’t collect data for this […]

Beyond the Basics (GPS and GIS) Part 4

Planning for GPS Data Collection—Mission Planning UsingQuick Plan Now that you are assured that you have an up-do-date almanac in the PC you are ready to plan the data collection session. Quick Plan is a sophisticated GPS planning program that runs under Microsoft Windows (version 3.1 and later). Quick Plan exhibits some dramatic graphic representations […]

Beyond the Basics (GPS and GIS) Part 5

PROJECT 7F This project will illustrate how taking data at the wrong time can result in loss of data. A route was driven at a time when only five satellites were visible. The same route was driven later when seven satellites could be tracked. The graph showing the PDOPs and number of satellites during the […]

← Previous Entries

Next Entries →