Bloggage update: As a fitting end to the Medieval Fenlands Mashup, UK Ordnance Survey will update their Parish shape files that had errors in East Anglia. These were found by running Socium's Online Validation on data downloaded for the purposes of mapping economic wealth in the region since Domesday 1067 survey. HC Darby and Julie Bowring data were simply added to the shapefiles by hand, so that a validation procedure seemed prudent. That is when we noted 25 spikes and kickbacks among 1900 poylgons, pretty good by digitizing standards at 1.3%. It was then a matter of alerting Ordnance Survey in one of their OpenData meet-ups, and presto! we looped the Volunteer Geographic Information loop by feeding back suggestions for the agency to correct. This is one of the benefits of the UK Government opening survey data to the public, who can help improve it in a new twist on crowd-sourcing.
Bloggage update: online spatial data validation (OVS).
Having transposed historic economic geographic data on shape files from the UK Ordnance Survey in my Medieval Fenlands project a couple of years ago, I can now test through socium.co.uk:
1) how good are vector data in East Anglia, as part of coi.guv.uk data feedback?
2) how well did I transpose attributes from Darby's map plates into shape files?
Using sets of rules on shape files, OVS is as simple as 1-2-3: 1) upload, 2) select the rules to test vector data integrity, 3a) view the report for free on line, or 3b) download it for one credit to get another shape file with "data busts" as points with descriptive attributes.
Having been in the geodata business for decades, I cannot see how data validation can be made any easier, while maintaining - indeed increasing - data integrity. This OVS highlights two of the "holy grails" in matters geospatial:
1) GIS depict complex data in a simple yet effective way, by placing them in their local context
2) web services offer two more opportunities:
a) to post geo-processes on-line that are easy to reach
b) to offer a flexible pricing plan that helps one and all
Guns & Roses, or: 3D GIS anyone? behind the colorful history of Teapot Dome in Wyoming, US and its current incarnation that released a comprehensive 3D petroleum dataset, lies this challenge: how is GIS approaching comprehensive 3D treatment (truly with overhangs and multi-Z's per XY, not 2.5D extrusion however useful that may be), with the increasing availability of robust 3D tools some for free (recent slashgeo post). To help with that I posted said dataset on arcgis.com and started revamping my geoscience classes also coming soon to a screen near you.
Outage issues from service providers and differing strategies in response to that are the subject of this latest blogpost. A very brief overview on how to store, edit and protect your data online from my own experience, echoes slashgeo's poll on Google vs. Esri web pre-eminence - there likely will be a dichotomy of open and custom solutions.
This is an update to my previous post here: I managed to get WMS on ArcGIS Explorer, with two caveats from ESRI Support related here, to produce a nice mashup directly online with more to follow... stay tuned!
Here's the recent geonews that we haven't already mentioned in batch mode.
In addition to last Friday's FOSS4G geonews:
In the miscellaneous category:
In the maps category: