Scoping a Geospatial Repository for Academic Deposit and Extraction
The GRADE Project is now closed. This site will no longer be maintained, and may contain broken links.
GRADE Questionnaire on Informal geospatial data-sharing
Descriptions of terms used
Geospatial dataset: a dataset that contains coordinate or location references (i.e. postcode). For the purposes of GRADE a geospatial dataset is defined as either: 1) Vector (point, line, polygon) data, 2) Raster (e.g. GeoTIFF images, Digital Terrain Models, orthophotography, satellite imagery), and 3) Tabular data (containing coordinate parameters).
Wiki: a freely editable webpage, anyone can use and change. Examples include: www.geowiki.co.uk is a 'Virtual psychogeography', or a map which you can annotate and add in your own locations or GPS tracks and comments, and the UK map will build up over time. Wikipedia.org, a free encyclopedia, contains lots of geography and GIS terminology that is editable, and a place to share knowledge, http://meta.wikimedia.org/wiki/Geographical_data is a (world) data and map image edit part of the site, but is mostly USA.
Web-based forum groups There are many examples of web-based forum groups, which discuss GIS issues, see: www.giscafe.com - discussion sites where people post links to free GIS programmes and data, problem-solving issues, and latest news.
FTP (File Transfer Protocol) is a free programme which has been around for many years and can be found and run in most University GIS labs. It uses UNIX commands to send ASCII and binary data to another IP address using remote nodes.
GeoChat: http://arcscripts.esri.com/details.asp?dbid=14408b (2006), it is based around MSN Messenger Accounts where parties chat and share geospatial data and information. It only works on Jabber/XMPP compatible servers, to start install a jabber client & register a new account, disconnect and reconnect using GeoChat
LionShare is a P2P file sharing system for academia: http://lionshare.its.psu.edu/main/. It is part of a Penn State University project using P2P technology and incorporating features such as authentication, directory servers, and owner controlled sharing of files, LionShare promises secure file-sharing capabilities for the easy exchange of image collections, video archives, large data collections, and other types of academic information.
Metadata is information about a particular data set which may describe, for example, how, when, and by whom it was received, created, accessed, and/or modified and how it is formatted. Data about data. For examples see: Go-Geo! Metadata creator tool from EDINA, and the Go-Geo! search engine Another example is MetaGenie, which is GIgateway's specially developed metadata creation software and search (Data Locator) tool.
Digital Repository = A place where content can be deposited, stored, searched, and downloaded (for more information visit GRADE project: : http://edina.ac.uk/projects/grade/ ) It has 4 main characteristics:
Content is deposited in a repository, whether by the content creator, owner or third party on their behalf
The repository architecture manages content as well as metadata
The repository offers a minimum set of basic services e.g. put, get, search, access control
The repository must be sustainable and trusted, well-supported and well-managed
Portal = A site that the owner positions as an entrance to other sites on the internet, a portal typically has a search engine and catalogues and pointers to other sites (for example EDINA Go-Geo!).