Technical support mission – Egypt, 2 – 12 J uly 2004 Towards data reference catalog With MDweb tool Program ROSELT/ OSS ROSELT/OSS Regional Coordination
Towards data reference catalog Content et objectives : : data valorisation and sharing 1. Principles Principles et objectives 1. 2. Conceptual Conceptual choices choices : : Generic tool 2. 3. Implementation Implementation : : MDweb, metadata management tool 3. 4.Installation of 4.Installation of Mdweb Mdweb : : local and regional installation 5. Data catalog catalog management : management : Roles definition 5. Data 6. On line 6. On line tool tool presentation presentation 2/ 35
Facts � Beyond the diagnosis : Evaluate of enviromental changes to understand and predict the desertification process � Heterogeneous data collection years after years, program after program, difficult to use (lack of data informations & structuration) 3/ 35
Principles et Objectives Main objectives Main objectives � Set- up an observatory environmental data (past, present and future) reference catalog consultable via intranet and Internet � Provide access to data via its metadata Principles Principles � Local data management by the observatories (cf. charter) � Data consolidation: regroup the local observatory DBs to give a uniform view of all data 4/ 35
Required Features Three main main features features Three � Reference � Reference : manually or semi- automatically input and update the observatory metadata � Publish � Publish : make the referenced datasets available so that they are accessible according to defined restrictions � Navigate � Navigate, , consult consult and and download download the data with the help of a query interface (keywords, geographic) 5/ 35
Towards data reference catalog Content et objectives : : data valorisation and sharing 1. Principles Principles et objectives 1. 2. Conceptual Conceptual choices choices : : Generic tool 2. 3. Implementation Implementation : : MDweb, metadata management tool 3. 4.Installation of 4.Installation of Mdweb Mdweb : : local and regional installation 5. Data catalog catalog management : management : Roles definition 5. Data 6. On line 6. On line tool tool presentation presentation 6/ 35
Generic tool � Multi- standards & multi- languages � Use and customisation for a scientific community through metadata « profile » (an ISO standard « view » or extraction) 7/ 35
Role and use of metadata � Know the data and its properties � Know the data and its properties the first role is to provide a better understanding of the existing data in all the network observatories (Inventory, description and cataloguing role) � Data � Data search search Main issue : propose a reference catalogue of information accumulated in the process of monitoring work lead by the observatory network � Access to � Access to the the data data 8/ 35
Choice of a metadata standard Today : apparition of ISO 19115 – – geographic Today : apparition of ISO 19115 geographic metadata ISO TC/ 211 metadata � International Standard (2003) Standardisation organisations Standardisation organisations, software , software distributors and countries adopting the standard distributors and countries adopting the standard OpenGIS � FGDC ISO 19115 ISO 19115 � CEN � AFNOR 9/ 35
ISO 19115 : metadata for geographical Information <<Leaf>> Content <<Leaf>> information Citation and responsible <<Leaf>> party information Constraint information <<Leaf>> <<Leaf>> Portrayal catalogue Distribution information information <<Leaf>> <<Leaf>> Metadata extension Maintenance <<Leaf>> information information Metadata entity set information <<Leaf>> <<Leaf>> Application schema Reference System <<Leaf>> information information Identification information <<Leaf>> Data quality <<Leaf>> information Extent <<Leaf>> information Spatial representation <<Leaf>> information Units of Measure (from derived) Main packages or sections of metadata standard 19115 10/ 35
Notion of metadata profile Standard « « View View » » or or « « profile profile » » Extraction of elements Standard from the standard (and its extension, if necessary) according to the needs of a community, project, or application Profile I SO Core standard 11/ 35
Typology of resources in ROSELT ?? Vegetation inventory ?? Inventory of habitats, flora and its diversity Ground Ground ?? Inventory of habitats, fauna and its diversity measures measures ?? Socio-economic survey ?? Pedological survey ?? Bioclimatic survey ?? Paper map ?? Digital map ?? Vector information layer ?? Raster information layer Georeferenced Georeferenced ?? Raw or pre-processed satellite image info info ?? Paper aerial image ?? Digital aerial image ?? Geographical database ?? Non-geographical database ?? Paper document Non- Non -geo geo ?? Digital document info info ?? Paper table ?? Digital table 12/ 35
Available profiles ? Vegetation inventory ? Inventory of habitats, flora and its diversity Ground Ground ? Inventory of habitats, fauna and its diversity measures measures ? Socio-economic survey ? Pedological survey ? Bioclimatic survey ? Paper map ? Digital map ? Vector information layer ? Raster information layer Georeferenced Georeferenced ? Raw or pre-processed satellite image info info ? Paper aerial image ? Digital aerial image ? Geographical database ? Non-geographical database ? Paper document ? Digital document Non- Non -geo geo info ? Paper table info ? Digital table 13/ 35
Detail level of metadata 3 levels of details defined : � cataloguing � cataloguing level level = = ‘cataloguing’ function ( localisation, general knowledge ) � sharing � sharing level level = = ‘sharing’ or ‘data access’ function (distribution format, access protocol,…) � integration � integration level level = = ‘data integration’ function ( data schema, geographical, temporal system of reference ) 14/ 35
Towards data reference catalog Content et objectives : : data valorisation and sharing 1. Principles Principles et objectives 1. 2. Conceptual Conceptual choices choices : : Generic tool 2. 3. Implementation Implementation : : MDweb, metadata management tool 3. 4.Installation of 4.Installation of Mdweb Mdweb : : local and regional installation 5. Data catalog catalog management : management : Roles definition 5. Data 6. On line 6. On line tool tool presentation presentation 15/ 35
Technical specifications : MDweb on Open Source softwares : Apache Based on Open Source softwares : Based server, PHP scripts, Open DBMS � Multi � : Unix, Linux or Windows Multi- - OS OS : � Multi � : Postgresql, MySQL, (ORACLE? ) Multi- - DBMS DBMS : � Multi � : english, french, other Multi- - language language : customisable languages � Multi � standards : ISO by default, possibilities Multi- - standards : to add other metadata standard 16/ 35
Tool architecture Import/Export Data caloguing Apache web PHP DBMS server Search scripts Tool administration MDweb Web browser DBMS : Database Management System (Postgres, MySQL, Oracle) 17/ 35
Catalog structuration � Choice of a metadata standard : � Choice of a metadata standard : ISO 19115 � Customisation � Customisation via the creation of ROSELT profiles � Input of the metadata sheets � Input of the metadata sheets according to the structure described by the defined profiles 18/ 35
MDweb database structuration Metadata sheets Form (profile) description Standard description 19/ 35
General MDweb Features � Secure � Secure access access by by password password � Customisation : � Customisation : choice of interface colour and language for each user � Input and update � Input and update of metadata sheets � Publication � Publication of input sheets � Consultation � Consultation of metadata sheets and data download � Administration � Administration of the tool 20/ 35
MDweb Features – input & Update � � Controlled form fields : Controlled form fields : calendar to input dates, counting the number of characters remaining, digital format � Input help : � Input help : use of values from a sheet already input for the input of a new sheet � Relationship links between sheets � Relationship links between sheets : : possibility to input the metadata sheet from a map and to join the sheets of its layers � Choice of a input level of detail : � Choice of a input level of detail : cataloguing, sharing, integration levels � Choice of sheet and data access level � Choice of sheet and data access level : visible or not during free consultation. 21/ 35
MDweb Features – publication Publication status : so long as a sheet is not Publication status : published it is not visible for any type of consultation. Direct publication if the publication rule is ‘automatic’, otherwise published by a validator or an administrator. 22/ 35
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