Spectral Library Documentation
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Tingxi Tan |
Overview Documentation Find out what the Spectral Library is and how it works. http:/ |
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Tingxi Tan |
Frequently Asked Questions 1) How do I create a Spectral Library? 2) What types of data are supported by the Spectral Library? 3) How can I upload data to a library and can I upload multiple files at the same time? 4) What are the different types of metadata fields? 5) What is the difference between library level and record level metadata? 6) How can I add/edit metadata for a library? 7) How can I add/edit metadata for multiple records at the same time? 8) How can I copy metadata from one record to another? 9) How do I associate an image or other ancillary data with spectral data? 10) How can I associate location information with spectral data so that it can be plotted on a map? 11) What is a virtual directory structure and how can I use it? 12) How do I set the default virtual directory structure for a library? 13) How do I specify the axis labels for a plot? 14) How can I plot multiple spectra at the same time? 15) How can I download a selected set of spectral and/or other files from a library? 16) How do I export to the GeoChronos format? 17) What is a schema and how can I use/create one? 18) How do I specify that a certain metadata field is required? 19) How can I share a spectral library with only my research group? How do I create a Spectral Library? To create a new Spectral Library, click on the 'SpectralLibrary' tool from the tools dropdown menu and click on 'Create a Library' from the side menu. Click here for a detail tutorial. What types of data are supported by the Spectral Library? General formats including SPU, ASD, ENVI, PRN. Specialized format for ASTER, VSL and GeoChronos. Click here for more information How can I upload data to a library and can I upload multiple files at the same time? To upload files, access an existing library that you have write permissions for and click the upload button at the bottom of the side menu. To upload multiple files, click on 'Show me the full uploader' link from the upload pop up window and drag and drop any files into the upload window. What are the different types of metadata fields? A metadata field can be of type 'Text'(text) for regular text inputs. 'Ancillary Data File'(ancillary_data_field) for ancillary data inputs and 'Latitude/Longitude'(latlong) for location based inputs. What is the difference between library level and record level metadata? Library level metadata describes the entire spectral library as a whole while record level metadata describes individual data file within a spectral library. Record level metadata can be used to organize spectral data using the virtual directory structure. How can I add/edit metadata for a library? Access an existing library and click the 'Metadata'tab in the library description window. To add new metadata, click on the 'New' tab. To edit, click on the desired schema tab and click 'Edit (Library) Metadata'. Click here for a detail tutorial. How can I add/edit metadata for multiple records at the same time? Select multiple files from the side menu folders by holding down ctrl or shift button and click on the desired files. Right click on the files to bring up the context menu and select 'Add/Edit Metadata'. Click here for a complete tutorial. How can I copy metadata from one record to another? Right click on a data file and click 'Copy'. Right click on the destination data file and click 'Paste as Metadata'. Click here for a complete tutorial. How do I associate an image or other ancillary data with spectral data? Right click on the image or ancillary data from the side menu folders and click 'Copy'. Right click on the destination spectral data file and move your mouse pointer over 'Paste as Ancillary data' and select the metadata field to paste as. The default field is 'dms:AncillaryData'. Click here for a detail tutorial. How can I associate location information with spectral data so that it can be plotted on a map? To associate location information, the piece of spectral data must first be using a schema that has a latlong type metadatafield. Look at this tutorial on how to do this. Once there is a latlong field, you can add it to spectral data by click on the 'Metadata' tab and associated schema tab and click 'Edit Metadata' to input location information. What is a virtual directory structure and how can I use it? The virtual directory structure allows a user to filter and organize spectral data into directories according to their metadata instead of their physical file directory structure. Look at this tutorial for more information. How do I set the default virtual directory structure for a library? From the library description window, click the 'Metadata' tab followed by the 'dms' tab. Click 'Edit(Library) Metadata' and input the desired virtual directory path into the 'dms:default_path' field. How do I specify the axis labels for a plot? Click the X or Y label of a plot and edit the X or Y label. You can choose to apply the new label name for the existing record only or to the entire library. Click here for a detail tutorial. How can I plot multiple spectra at the same time? Select multiple files from the side menu directories by holding ctrl (command on Mac) and clicking on the desired files. Right click on the files to bring up the context menu and click 'Plot spectra'. Click here for a detail tutorial. How can I download a selected set of spectral and/or other files from a library? Multi select the desired files by holding ctrl (command on Mac) and click the 'Export' button at the bottom of the side menu. How do I export data to the GeoChronos format? Multiselect the desired files by holding ctrl (command on Mac) and click the 'Export' button at the bottom of the side menu. Click here for a complete tutorial. What is a schema and how can I use/create one? Schemas are used to organize metadata within the Spectral Library module. A schema could be created to represent the metadata recorded by a particular scientific instrument. A schema could also be created by a group of scientists to incude a set of agreed upon metadata relevant to their particular research project. Follow this tutorial on how to create and use a schema. How do I specify that a certain metadata field is required? Access an existing schema that you have write permissions to . Click 'Edit' in the 'Keys' display section. In the 'Additional MEtadata' section, change the 'Required' value to 'required' for each metadata field that you want to be required. How can I share a spectral library with only my research group? Click 'Edit' on an existing library that you have write permissions to in the 'Your Libraries' link. Select your group name under the 'Access' and 'Write Access' drop down list. If you do not have a group yet, create it by following this tutorial. |
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