Wednesday, May 23, 2012
Wednesday, May 09, 2012
ArcPad and in-field data validation
As a GIS team leader I want to have a high level of confidence that the data collected and ultimately published to a wider audience is truthful at the time of collection because business decisions and operating costs will depend on it. As a small team we don’t have the time or resources to run QA after the fact, so it has to be correct when the user presses OK!
- Cross checking different attributes.
- Verify no “null” entries exist.
- Check calculated fields have reasonable results (no negative values).
- Make you recollect the geometry of a point if the PDOP was too high (>3.4) .
- The order you collect data on a form.
- Check the geometry of a point is inside a polygon before you enter data on a form (DIY Topology).
- Verify that there are no spaces or numeric characters in a text box.
- Disable custom tools because of the data you are using.
If the textboxName has no value entered tell the user to fill in the Name text box -
If textBoxName = "" then ThisEvent.Result = False ThisEvent.MessageText = “Please enter a Name”End If
Friday, May 04, 2012
Using ArcPad to Collect Data for OpenStreetMap
OpenStreetMap s a collaborative project to create a free editable map of the world. This includes a massive community of OpenStreetMap Contributors collecting spatial data in their local area to include in the project. It is easy for anybody to get involved and begin to make contributions, see the OpenStreetMap Beginner's Guide for more information.
As professional field data collection software, ArcPad is a great tool for collecting and editing OpenStreetMap data.
ArcGIS, ArcPad and OpenStreetMap
If you are working within the ArcGIS environment, there is an ArcGIS Editor for OpenStreetMap designed to help ArcGIS Desktop 10 users to become active members in the growing community of users building the OpenStreetMap database of geographic data. This editor has been built for ArcGIS Desktop 10 SP3 + and includes the following tools:
- A set of geoprocessing tools and models to download, extract, and upload vector data from and to the OpenStreetMap server.
- Customizations to the core editor environment in ArcMap to handle the OpenStreetMap tags inside the core Esri software.
- A conflict editor user interface to similar to the Reconcile Version tool for enterprise geodatabases.
Open Source Software, ArcPad and OpenStreetMap
If you are working in the open source environment, ArcPad can also be used to edit and create new features in shapefile datasets. There are many freely available tools that can be used to convert OpenStreetMap data to shapefile format, as well as tools that can be used to import shapefile data back to OpenStreetMap server. This allows you to leverage the power and professionalism of ArcPad for the field data collection and editing aspects of your OpenStreetMap survey projects.
Either of these methods will allow you to use ArcPad to support OpenStreetMap and it's commitment to the growth, development and distribution of free geospatial data for anybody to use and share.