Tag: intrinsic quality analysis
-
Preview: Spatial Joins using the OpenStreetMap History Database OSHDB
Max is two and loves spending Monday afternoons with his Dad at the playground. Finding a suitable playground however isn’t easy, since a few criteria must be met: there should be a bench and some trees nearby to get shelter from the sun and an ice cream shop within the neighbourhood. Using the new spatial…
-
Call for State of the Map 2019 academic track is open
The call for State of the Map 2019 (SOTM) academic track is now open until: 10th May 2019. Read more: https://2019.stateofthemap.org/calls/academic/ tl;dr Please read the submission guidelines and submit your presentation proposal before May 10 to the submission form. This year’s State of the Map conference in Heidelberg will again feature a full day Academic Track session. Following…
-
Global analyses are ohsome
We, the Big Spatial Data Analytics Group at HeiGIT have ohsome news to share: From now on, you can send your requests to our global ohsome API instance. So far, we’ve had a public instance for Nepal and Germany, but now you can analyse OSM’s history globally. Additionally to the API, we also have a global dashboard instance. You choose any…
-
How to become ohsome part 3: Identifying different mapping schemes
This is your first blog of the ohsome series? Before you might be confronted with any potential spoilers, you should better check out the first and the second part of this blog series (or the intro to the idea and general architecture) to be on the safe side and up to date with the current content. So…
-
Spatial conceptual compliance analysis with the OpenStreetMap History Database (OSHDB)
In a previous blog post we performed a conceptual compliance analysis between OSM data and several tagging-guidelines using the OSHDB API. The results were visualized in a line chart, comparing the different compliance ratio over several months. The following analysis focuses on a spatial representation of the conceptual compliance. It is conducted for the “iD-editor”…
-
Over 50 Open Source GIScience Repositories on GitHub
The GIScience Research Group at Heidelberg University and the Heidelberg Institute for Geoinformation Technology (HeiGIT) are happy to share the their GIScience github repository contains now already over 50 open source repositories and it’s still growing. These contain results from several research projects and in particular also some very active long term activities. Most of the tools…
-
Today & tomorrow GIScience Heidelberg Talks in Africa and Australia
This Wednesday and Thursday we have presentations from the GIScience research group Heidelberg on two remote contintents – both in Africa and in Australia: On Wednesday: First down under at GIScience Melbourne in Australia Rene Westerholt will present the work related to our PLATIAL18 workshop: Westerholt, R., Gröbe, M., Zipf, A. and Burghardt, D. (2018): Towards the statistical…
-
OpenStreetMap Analytics Development for OpenCities Africa
Recently a consultancy and development agreement about OpenStreetMap Analytics Development has been reached with the World Bank in the context of the Open Cities Africa project and the Global Facility for Disaster Reduction and Recovery (GFDRR) Open Data for Resilience Initiative (OpenDRI). The main objective of this consultancy is to develop and implement new functionalities for…
-
Ohsome for Street Network Analysis and Disaster Activation Monitoring
Disaster mapping activations that are supported by many volunteers with various levels of experience raise questions related to the quality of the provided Volunteered Geographic Information. Learning about the data quality that can be expected in a disaster activation helps to evaluate the quality and fitness for purpose of the OSM data. At the ISCRAM…
-
Ohsome Nepal Dashboard supports admin boundary selection
The Ohsome Nepal Dashboard has new features to enhance its usability and functionality. The user can now easily select administrative areas of interest through a new map interface. Different administrative levels can be selected by zooming in and out and afterwards just clicking or tapping on that specific region. This convenience feature makes it much faster…
-
Ohsome – a high level architectural overview of the OSM History Analytics platform
Recently we introduced the ohsome platform for OSM History Analytics. Now we want to give you a high-level overview of the ohsome platform and the components it consists of. Ohsome API The ohsome platform is based on a three-layers API architecture, where the flexibility, as well as the usage-complexity are increasing going from the top to…
-
A taxonomy of quality assessment methods for volunteered and crowdsourced geographic information
The growing use of crowdsourced geographic information (CGI) has prompted the employment of several methods for assessing information quality, which are aimed at addressing concerns on the lack of quality of the information provided by non‐experts. In a recently published work, we propose a taxonomy of methods for assessing the quality of CGI when no…