Working with Metadata

This section offers information about all aspects of working with LizardTech metadata, that is, metadata in the MrSID and JPEG 2000 formats. There are two workflows for editing metadata: applying metadata as images are encoded and modifying metadata in existing images. Setting metadata is done in the Metadata Manager and works the same way for both workflows.

For information on NITF* metadata, see and NITF* Input Metadata.

*Support for encoding NITF images is available for GeoExpress. Contact your LizardTech representative to purchase the NITF Extension for GeoExpress.

Types of LizardTech Metadata

There are two categories of LizardTech metadata, user metadata and image metadata. The information for user and image metadata is contained in metadata tags.

User Metadata

LizardTech user metadata is merely descriptive and has nothing to do with the image pixel data. There are 12 default user metadata tags. They can be thought of as addenda or footnotes and include such data as geographic location, company name, and scan info. You can include data for any or all or none of the tags, and you can add your own custom user metadata tags for other information you would like to include. All of LizardTech's user metadata tags can be edited (see and ).

Image Metadata

LizardTech image metadata is information about the pixel values that tells viewing software how to interpret or treat each pixel. There are many image metadata tags (see LizardTech Image Metadata), and a small subset of these are available for editing (see mrsidgeometa).

NOTE: Editing the image tags does not affect the pixel values themselves. For example, changing WKT metadata does NOT reproject an image from one CRS to another. However, changing metadata may affect how an image is displayed in a viewer.

Click any link below to go to the corresponding topic.

LizardTech Image Metadata

Sample MrSID Metadata

Adding Custom Metadata