[wiki:WikiStart Home] | [wiki:HowToUploadData Uploading] | [wiki:HowToViewData Viewing Data] | [wiki:Search Search] | [wiki:HowToMakePublic Making Public] | [wiki:Lists] | [wiki:SampleObject Sample Attributes] | [wiki:ChemicalAnalysisObject Chemical Analysis Attributes] | [wiki:ImageObject Image Attributes] | [wiki:XMLObject XML Output] | [http://metpetdb.rpi.edu/ To MetPetDB] ---- = Image = Images are central to metamorphic geochemistry, and images must be stored with rock descriptions and [wiki:ChemicalAnalysis chemical analyses]. MetPetDB will store images of every type tagged to [wiki:Sample samples] or [wiki:Subsample subsamples]. Doing this in a way that provides the maximum flexibility and also enables spatial relations in a sample are critical to the usefulness of the database. Information about image object model can be found in the [wiki:ImageObject Image Object] page. == Image registration == In many situations, a large number of images may be collected on a single polished thin section (e.g. photomicrographs, BSE images, X-ray maps, etc.). The spatial relationship of these images is an important piece of information. MetPetDB will preserve this information in the following way. All images collected on a specific subsample of a sample (eg. a thin section) will be spatially located with respect to either a thin section template, or another image (the parent image). The thin section template will be an empty coordinate system the size of the thin section glass. A digital scan of the thin section will fit inside this template. Other images will be located relative to either this template, or to a parent image. Four pieces of information are required to correctly locate one image with respect to another. Two ways to specify this information are: * (X,Y) position of two corners of the daughter image with respect to the parent image * (X,Y) position of one corner (or center) of the daughter image, a rotation angle, and a scale factor Some of the fields in the image data description record are for the purpose of this registration. == Chemical analysis registration == Chemical analyses by electron microprobe are located at a small spot on a sample, and this is often recorded on an image. In the old days, this was done by placing a dot on a photomicrograph with a pen. Modern microprobes do this digitally. See the page on chemical analyses for more information. == Image types == #Types Some fields required for certain image types. You may spell out name or use abbreviations. Acceptable image formats are: .jpg , .gif , .tif , and .png. ||'''Image Type'''||'''Abbreviation'''||'''Comments'''|| ||Field Notes||'''FIELDNOTES'''||Scanned/digital field notes|| ||Drawing||'''DRAWING'''|| hand sketch or drawing|| ||Map||'''MAP'''||Map (geologic or otherwise) with sample locations|| ||Cross Section||'''XC''' ||Geologic cross section with sample locations|| ||Figure||'''FIG'''||Miscellaneous figure, may be composite|| ||Field Photo||'''FIELDPHOTO''' ||Field photo of outcrop or sample location|| ||Photograph||'''PHOTO''' ||General sample imagery|| ||Thin Section Scan||'''TSS''' ||Special image of entire thin section|| ||Photomicrograph-Transmitted Plane Polarized|| '''TPPL'''|| || ||Photomicrograph-Transmitted Crossed Polars || '''TXPL'''|| || ||Photomicrograph-Reflected Plane Polarized || '''RPPL'''|| || ||Photomicrograph-Reflected Crossed Polars || '''RXPL'''|| || ||Secondary Electron Image ||'''SE'''|| || ||Back-Scattered Electron Image ||'''BSE'''|| || ||Cathodoluminescence Image ||'''CL'''|| || ||X-ray Map ||'''XRM''' ||Element name (or combo) is required for X-ray maps|| ---- [wiki:WikiStart Home] | [wiki:HowToUploadData Uploading] | [wiki:HowToViewData Viewing Data] | [wiki:Search Search] | [wiki:HowToMakePublic Making Public] | [wiki:Lists] | [wiki:SampleObject Sample Attributes] | [wiki:ChemicalAnalysisObject Chemical Analysis Attributes] | [wiki:ImageObject Image Attributes] | [wiki:XMLObject XML Output] | [http://metpetdb.rpi.edu/ To MetPetDB]