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 |
|---|---|---|---|
| Active Fault/Quaternary Fault |
This content model includes data elements that are in the content model for Geologic Map/faults, as well as elements providing information specific to Quaternary faults relating to slip rates, time since most recent activity. Faults are typically represented on maps by the linear outcrop trace where the fault intersects the Earth Surface. Thus the feature service for fault uses a line feature class for the geometry. This linear geometry can not simply be represented in a spreadsheet, so a template for service deployment is provides as an ESRI personal geodatabase (which is a Microsoft Access .mdb file). In addition, for consistency with point-based content models, an Excel Workbook is provided with work sheets for the data provider metadata, description of fields in the template, and vocabularies recommended for use in interchange documents. For those that do not have software that will work with the geodatabase file, a zip archive containing a shape file feature class is included. The shape file truncates field names and text values that are strings longer than 255 characters. If some field contain text longer than 255 characters, fault descriptions should be loaded into the excel worksheet included with the shape file. In that case, be sure that there is a key to uniquely join the shape field information with the fault description information.
|
1.200 | Feb 6 2012 |
| 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 |
| Borehole Lithology Intercepts | 1.100 | 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 |
| 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 |
| Direct Use Feature |
Direct use features describe facilities that utilize geothermal energy directly without transformation to electricity. See the NREL Geothermal Direct Use web page for more information. The template here is based on the Direct Use Site spreadsheet provided by the GeoHeat center at the Oregon Institute of Technology. |
1.520 | Apr 25 2012 |
| 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 |
| 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.
|
2.000 | Jul 3 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 |
| 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 |
| 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 |
| Geothermal Area |
This package contains both an Excel spreadsheet and an accompanying personal geodatabase (PGD) for data delivery of a Geothermal Area dataset (polygons). Design is focused on providing characteristics of sites identified as having geothermal potential. Geothermal area content for the state geothermal data system is intended as a tool to identify areas that may be associated with geothermal resource potential. Thus, the content model does not include specific measurements/data collection information that would be important for analysis; such information should be accessed by querying other related data sets in the area of interest such as borehole temperature observation services, thermal conductivity services, and published reports. The deliverable is the personal geodatabase containing the geometry information. |
0.500 | Mar 21 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 |
| Heat Flow |
This spreadsheet indicates the content requested for observation features representing Heat Flow measurements. The content model is based on specifications gathered from the SMU Heat Flow database, and has been extended to include the specifics of Heat Flow data from other parties. Minimal required features include Observation URI, Well Name, Header URI, Label, County, State, Latitude and Longitude Degrees, Source, Driller Depth, Interval, Thermal Conductivity, Gradient, Heat Flow, and Heat Flow Method. |
1.230 | Jun 25 2012 |
| Heat Pump Facility |
This spreadsheet indicates the content requested for features representing heat pump facility locations. Design is focused on sites/facilities portrayed as geospatial points with associated facility type, use application, and operational date. Heat Pump facility data for the geothermal data system is intended as a tool to identify information related to facility construction and location, thus the content model may not include detailed information. Such information should be accessed by including related resource links. As such, data is intended to be restricted to records for existing heat pump facilities. |
0.600 | Mar 21 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 |
| 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 |
| 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 |
| Power Plant Facility |
This spreadsheet contains content requested for features representing Geothermal Power Plant locations. Design is focused on power plants portrayed as geospatial points with an associated plant type, capacity in megawatts, and use application. Power plant data for the geothermal data system is intended as a tool to identify sites with existing power plants. Thus, the content model may not include detailed information that would be important for determining geothermal potential; such information should be accessed by including related resource links. As such, data should be restricted to records for existing facilities. |
0.200 | Mar 21 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 |
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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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