Data Interchange Content Models
Each feature or observation type that is prioritized for delivery using a community data interchange format has an associated content model that defines the information contained in interoperable interchange documents that deliver data from the data system servers to client users. The content model in its simplest form is a statement that some particular entity (feature or observation) will have some list of properties. For example a content model for a record describing a book feature might include: title, author, publisher, publication date, publication place, number of pages, and an ISBN number (a URI).
To document these content models, we are using MS Excel workbooks. Each workbook includes a description of the entity type, a list of the elements (fields, attributes) in a data instance for that entity presented both as a table and a list, and lists of vocabulary terms meant as a start or example for the kinds of vocabularies that will be required in the long run for semantic interoperability. Use of the terms in these example vocabularies will facilitate migration to formal vocabularies later.
In order to actually use the content models, they must be implemented using some computer-friendly encoding scheme. The AASG project is currently using eXtensible Markup Language (XML) to implement the content models, but in view of the rate of technology evolution, other schemes may be adopted as the system matures. The important thing is that the information is encoded consistently in a structured, well documented format. This enables computer programs to parse the interchange documents and extract the desired information, and as newer encodings are adopted, conversion between formats can be automated using software.
These content models are being developed under the auspices of the AASG geothermal data project, but they are being submitted for review and adoption for use by other project partners in the NGDS and broader USGIN community. To view applications that are compatible with the NGDS, please visit the NGDS Applications page.
| Title | Summary | Most recent version |
Most recent update |
|---|---|---|---|
| Borehole Lithology Intercepts | 1.100 | Mar 6 2013 | |
| Well Tests |
This template defines the content model for a service that delivers well stem test data collected during development of Oil and Gas wells. Normal drilling procedures control formation pressures and fluids through the use of a hydrostatic head. Well testing brings these formation pressures and fluids to the surface. Data collected during the test procedure will be provided through the well test feature service. Types of tests include Production, G10, Drill Stem, Drawdown, Buildup, and other well test types. |
1.000 | Mar 6 2013 |
| Borehole Lithology Interval Feature |
This spreadsheet specifies the content elements requested for AASG geothermal data interoperable web services for description of lithology log intervals associated with a borehole. Each interval has a top and a bottom, measured from the ground surface (convention for interoperability). Each interval has a geologic unit description that will be identical with the content associated with polygons on a geologic map. |
0.900 | Feb 28 2013 |
| Volcanic Vents |
This spreadsheet indicates the content requested for features representing active volcanic vent data. This simple content model is intended to identify recently active volcanic vents that may indicate areas of active hydrothermal systems. Detailed geophysical or geodetic information related to active magma movement and prediction of eruptive activity are out of scope. |
1.430 | Feb 27 2013 |
| Rock Chemistry |
RockChemistryAnalysis-Basic contains fields for information used to discover and retrieve chemical analyses meeting various criteria, and to evaluate the reported results. These fields would be reported along with a collection of analytes from the different suites proposed on the suites table. |
0.400 | Feb 27 2013 |
| Drill Stem Test Observations |
This spreadsheet defines the schema used for the interchange of drill stem test observation results by the AASG geothermal data project for the National Geothermal Data System. The HeaderURI for a particular borehole (well for simple wells) is the cross-referencing link (foreign key) used to associate the header record, well logs, temperature measurements, and other information from a particular borehole. At minimum the data will report Observation URI, Well Header URI, Well Name, API No, DST Name, DST Operator, Lat Degree, Long Degree, SRS, DST Target Formation, Depth Top Open Zone, Depth Bottom Open Zone, Pressure Initial Shut In, Pressure Final Shut in, Hydrostatic Pressure, Source, and Information Source. |
1.800 | Feb 27 2013 |
| Borehole Temperature Observation |
This is a data interchange content model for a subsurface temperature measurement made in a borehole. Header content that characterizes the borehole sampling feature is included with each observation to assist users finding measurements based on location, depth, particular borehole, etc. This information will be provided through a borehole temperature observation service. The HeaderURI for a particular borehole (well for simple wells) is the cross-referencing link (foreign key) used to associate the header record, well logs, temperature measurements, and other information from a particular borehole. |
1.510 | Feb 26 2013 |
| Aqueous Chemistry |
This is a data interchange content model for an observation of the chemical composition of an aqueous fluid. A header content model for sample characterization, location, and analysis metadata is included to assist users finding analyses for specific samples, locations, time intervals, etc. Typically water temperature at the time of sampling are recorded along with sample data. Several 'suites' of analytes representing common analysis results are defined, with the intention that an implementation of the content model would offer several observation feature types, each of which consists of the header fields combined with the analytes for a suite. A content type for reporting results for a single analyte is also proposed, with an abbreviated header; this could be implemented for services similar to the EPA storet data services. In this approach a single analysis result is delivered as a collection of observation records, each with the same AnalysisURI and reporting single analyte. |
1.100 | Feb 14 2013 |
| Powell Cummings Geothermometry |
The Powell and Cummings Geothermometry content model reports gas and liquid analytes. Field headings match those in the Powell and Cummings, 2010 spreadsheets and can be directly inputted into their model, which creates numerous ternary diagrams and other Excel graphics to create a geothermomerty report. |
0.100 | Oct 19 2012 |
| Fluid Flux Injection and Disposal |
This spreadsheet contains the content requested for records representing Fluid Production reports and observations. Design is focused on production/injection wells associated with Power Plant facilities, portrayed as geospatial points with an associated production interval date. This dataset for the geothermal data system is intended as a tool to identify records associated with geothermal plants in production (or injection) or other facilities that may be of interest for coproduction of geothermal fluid. The content model does not include detailed geologic information that would be important for an analysis; such information should be accessed by included related resource links. |
1.000 | Oct 15 2012 |
| Well Fluid Production |
This workbook documents a content model for exchange of information about fluid production for a given well. A generic model is intended to allow for a variety of flows from a well including oil, gas, and water as well as steam production. **PLEASE NOTE:** |
1.000 | Oct 15 2012 |
| Geothermal Fluid Production |
This template defines the content model for a service that delivers geothermal fluid production observations. Many of these will be a standard map location and production volume, but other information may be delivered. The geothermal fluid production content model is designed to be used for data compilation from publications, reports, and databases. This content model is intended to present key information necessary to query a geothermal fluid production observation service and to evaluate the reported data. **PLEASE NOTE:** This spreadsheet is still under review; please contact us before using it. |
1.000 | Oct 15 2012 |
| Radiogenic Heat Production |
This workbook documents a content model for interchange documents with data from measurements of Radiogenic Heat Production based on analysis of individual rock samples. This content model is currently in review by the GDSDPWG working group. |
0.500 | Oct 2 2012 |
| Power Plant Production |
This workbook documents a content model for reporting electrical power production. In the context of NGDS, these will normally be geothermal power plants, but the content model is not unique to a single power plant type. This content model is currently in review by the GDSDPWG working group. |
0.800 | Sep 28 2012 |
| Physical Sample |
This workbook documents a content model for basic data characterizing a physical sample. This content model is currently in review by the GDSDPWG working group. |
0.800 | Sep 25 2012 |
| Metadata |
This template is for use in compiling metadata content in a structured tabular format that can be automatically transformed into any of several metadata encoding and content schemes. The content is based on the USGIN Recommended Metadata Model. The goal of this template is to make metadata creation easier while still complying to metadata requirements for the:
This spreadsheet is somewhat different from other templates in that the column names in the spreadsheet are not precisely the same as xml elements in the interchange document used to transport the metadata content. Metadata is being encoding for the NGDS using ISO19139 xml encoding of ISO 19115 content. This is a complex XML schema that can not be fully represented in the flat table format offered by a spreadsheet. Column names in the spreadsheet correspond to element names in the XML loosely. See also: USGIN content recommendations for geoscience information resources. USGIN full ISO 19139 metadata profile (ISO 19115 and ISO 19119). Not for the faint of heart. |
1.350 | Jul 10 2012 |
| Thermal/Hot Spring Feature |
This spreadsheet indicates the content requested for basic data characterizing a hot spring feature for the AASG geothermal data project. Typically, water temperatures are recorded with other information such as water quality or chemical analysis from a particular spring. The temperature and flow rate reported here are meant to be generalized characterization. Other observation services should be used to report time series of temperature or flow measurements. Chemical analytical data is also reported by a separate observation service. This sheet may be used to compile multiple temperature or flow rate observations for individual springs as well. |
1.610 | Jul 6 2012 |
| Geologic Unit Feature |
This spreadsheet indicates the content for Geologic Unit features. The model is based on the IUGS CGI interoperability working group. See https://www.seegrid.csiro.au/wiki/bin/view/CGIModel/GeoSciMLThematicView.... This schema is a view of GeoSciML data that denormalizes the data and concatenates complex property values into single, human-readable, labels and returns single, representative values from controlled vocabularies for multi-valued properties that can be used when generating thematic maps, or portrayals, of the data. It is separate to, but harmonized with, GeoSciML and conforms to the level 0 of the Simple Features Profile for GML (link). Labels will be 'free-text' fields that will be, in robust services, well-structured summaries of complex GeoSciML data, while the representative thematic properties will be URIs of concepts in a controlled vocabulary. There may also be links, via identifier URIs, to full GeoSciML representations of the geologic features. The geologic unit feature content also conforms closely to the content in the USGS-AASG NCGMP09 database design for a description of map units. These features are essentially geographically located descriptions of outcrop to map scale units of rock--including lithologic composition, age, internal structure (bedding, foliation etc.) and genesis. The content model might be associated with map units on a geologic map, individual polygons (on a map) or borehole intervals (in a stratigraphic log), or with point locations to describe outcrops in field data. For descriptions associated with maps or polygons (outcrop areas), location uncertainty properties are not included. |
2.000 | Jul 3 2012 |
| Geologic Contact Feature |
This spreadsheet indicates the content for contact features. The model is based on the IUGS CGI interoperability working group. See https://www.seegrid.csiro.au/wiki/bin/view/CGIModel/GeoSciMLThematicView.... This schema is a view of GeoSciML data that denormalizes the data and concatenates complex property values into single, human-readable, labels and returns single, representative values from controlled vocabularies for multi-valued properties that can be used when generating thematic maps, or portrayals, of the data. It is separate to, but harmonized with, GeoSciML and conforms to the level 0 of the Simple Features Profile for GML (link). Labels, will be 'free-text' fields that will be, in robust services, well-structured summaries of complex GeoSciML data, while the representative thematic properties will be URIs of concepts in a controlled vocabulary. There may also be links, via identifier URIs, to full GeoSciML representations of the geologic features. |
2.000 | Jul 3 2012 |
| Fault Feature / Shear Displacement Structure |
This spreadsheet indicates the content for fault features. The model is from the IUGS CGI interoperability working group. See https://www.seegrid.csiro.au/wiki/bin/view/CGIModel/GeoSciMLThematicView.... This schema is a view of GeoSciML data that denormalizes the data and concatenates complex property values into single, human-readable, labels and returns single, representative, values from controlled vocabularies for multi-valued properties that can be used when generating thematic maps, or portrayals, of the data. It is separate to, but harmonized with, GeoSciML and conforms to the level 0 of the Simple Features Profile for GML (link). Labels will be 'free-text' fields that will be, in robust services, well-structured summaries of complex GeoSciML data, while the representative thematic properties will be URIs of concepts in a controlled vocabulary. There may also be links, via identifier URIs, to full GeoSciML representations of the geologic features.
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2.000 | Jul 3 2012 |
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Sponsored by the U.S. Department of Energy under award DE-EE0002850 to the Arizona Geological Survey acting on behalf of the Association of American State Geologists.
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