title_header Laboratory on Geoinformatics and Cartography 3. DISCOVERY PROCESSES, SEARCHING FOR SPATIAL DATA AND WEB SERVICES title_header Laboratory on Geoinformatics and Cartography •The main ingredients we need to discover relevant spatial data/data series/services/… are: –1. Metadata describing a resource – (in exchangeable format) –2. Discovery service The concept of discovery in ESDI zdrojak 1. 2. title_header Laboratory on Geoinformatics and Cartography Designation of the same is different in OGC services and INSPIRE •Get used to it! •Do you know OGC (Open Geospatial Consortium) Catalogue Service for Web? –Then you know INSPIRE Discovery service •Do you know OGC (Open Geospatial Consortium) Web Map Service? –Then you know INSPIRE View service •Do you know OGC (Open Geospatial Consortium) Web Feature Service? –Then you know INSPIRE download service •To be continued… • title_header Laboratory on Geoinformatics and Cartography 1.Through a “thin” client –typically a Web browser – – – – 2.Through a “thick” client –e.g. a catalogue client, common for GI professionals • Two possibilities of connecting to a discovery service http://www.plan4all.eu/simplecms/ds/uploads/ProvRoma/Hyper6.jpg http://www.conterra.de/img/afi_5a.gif http://www.tmapy.cz/public/tmapy/img/assets/1136/MetIS.png MDE_vyplnění_MD.png title_header Laboratory on Geoinformatics and Cartography •Type in http://inspire-geoportal.ec.europa.eu/ or http://geoportal.gov.cz/web/guest/catalogue-client • Let’s make it simple…a use case with Web browser title_header Laboratory on Geoinformatics and Cartography •Sure, all this is originating from INSPIRE legislation • • • • • •COMMISSION REGULATION (EC) No 976/2009 of 19 October 2009 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards the Network Services •https://inspire.ec.europa.eu/network-services/41 • Legislation background title_header Laboratory on Geoinformatics and Cartography •Sure, all this is originating from INSPIRE legislation • Legislation background Aren’t you missing anything? title_header Laboratory on Geoinformatics and Cartography Intersects.png § § § § § § Intersect as a spatial operator Laboratory on Geoinformatics and Cartography title_header Laboratory on Geoinformatics and Cartography •Get Discovery Service Metadata –i.e. GetCapabilities according to the OGC •Discover Metadata –i.e. GetRecords according to the OGC •Publish metadata –i.e. harvest, transaction according to the OGC •Link Discovery service –an equivalent of service chaining according to the OGC Operations of an INSPIRE discovery service title_header Laboratory on Geoinformatics and Cartography •Intended for “thick” clients •Not applicable for an ordinary user with a Web browser Get Discovery Service Metadata catalogue client http://geoportal.gov.cz/php/micka/csw/index.php?SERVICE=CSW&REQUEST=GetCapabilities Title Czech Republic INSPIRE metadata catalogue Service type INSPIRE Discovery Service (CSW – Catalogue Service for Web according to the OGC) Service version 2.0.2 Supported languages Czech, English Fees Free of charge Responsible Party CENIA, Czech Environmental Information Agency E-mail info@cenia.cz Supported operations Get Discovery Service Metadata Discover Metadata Publish metadata Link Discovery service title_header Laboratory on Geoinformatics and Cartography Discover Metadata 1. Choose a resource type 2. Select search criteria as defined by legislation 3. Start searching title_header Laboratory on Geoinformatics and Cartography Discover Metadata title_header Laboratory on Geoinformatics and Cartography Discover Metadata title_header Laboratory on Geoinformatics and Cartography Preview of discovered Web service title_header Laboratory on Geoinformatics and Cartography Where is the difference in comparison to other catalogues? •It is an SDI catalogue! Enables to search in other associated catalogues as well at the same time. • title_header Laboratory on Geoinformatics and Cartography Catalogue server Client application Catalogue server Catalogue server Catalogue server Catalogue server Catalogue server zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak Chaining of catalogues (through Link Discovery Service Operation) title_header Laboratory on Geoinformatics and Cartography ID: 3d8-4900 revision: 2014-08-20 ID: 9a4e Revision: 2014-08-20 ID: 1e400a010817 Revision: 2014-08-20 ID: 518b64b1 Revision: 2014-08-20 Publish metadata (harvest) catalogue catalogue zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak zdrojak 1.I would like to update your catalogue - my authorization details - list of metadata records including IDs and the date of the last revision 1. 2. Note: publish metadata, in this version designated as harvesting (harvest records) may be set up periodically. 2. OK, three of four of your metadata records are new, I am updating them title_header Laboratory on Geoinformatics and Cartography Publish metadata (transaction) catalogue client zdrojak zdrojak zdrojak 1.I would like to update the metadata record with ID 1e400a010817 - authorization details 2. 2. OK, authorization details are correct, here is the metadata record with ID 1e400a010817 3. Uploading the modified metadata record with ID 1e400a010817 1. 2. 3. Resource Title National parks in the Czech Republic Identifier 1e400a010817 Abstract A database containing detailed information about all 3 national parks in the Czech Republic. This database… Classification Environment Keyword Protected Sites Date of creation 1995-01-05 Date of revision 1999-04-23 Linkage http://inmapy.cz/data/NatPark Responsible Party INmapy.cz company E-mail info@inmapy.cz 2014-08-21 4 _v2.0 zdrojak title_header Laboratory on Geoinformatics and Cartography •Again defined in legislation •The response time for sending the initial response to a Discovery service request shall be maximum 3 seconds in normal situation. Normal situation represents periods out of peak load. It is set at 90 % of the time. •The minimum number of served simultaneous requests to a discovery service according to the performance quality of service shall be 30 per second. •The probability of a Network Service to be available shall be 99 % of the time. Quality of service title_header Laboratory on Geoinformatics and Cartography Quality of service Uptime [%] Maximum downtime Per week Per month Per year 95 8.4 hours 36.00 hours 18.25 days 98 3.4 hours 14.40 hours 7.30 days 99 1.7 hours 7.27 hours 3.63 days 99.9 10 minutes 0.73 hours 8.76 hours