objectType SimpleImageAccess

The capabilities of an SIA implementation.

Members

name	type	mult	description
imageServiceType	ImageServiceType		The class of image service: Cutout, Mosaic, Atlas, Pointed
maxQueryRegionSize	SkySize	optional	The maximum image query region size, expressed in decimal degrees. Not providing this element or specifying a value of 360 degrees indicates that there is no limit and the entire data collection (entire sky) can be queried. Not providing a value is the prefered way to indicate that there is no limit.
maxImageExtent	SkySize	optional	An upper bound on a region of the sky that can be covered by returned images. That is, no image returned by this service will cover more than this limit. Not providing this element or specifying a value of 360 degrees indicates that there is no fundamental limit to the region covered by a returned image. When the imageServiceType is “Cutout” or “Mosaic”, this represents the largest area that can be requested. In this case, the “no limit” value means that all-sky images can be requested. When the type is “Atlas” or “Pointed”, it should be a region that most closely encloses largest images in the archive, and the ”no limit” value means that the archive contains all-sky (or nearly so) images. Not providing a value is the prefered way to indicate that there is no limit.
maxImageSize	ivoa:integer	optional	A measure of the largest image the service can produce given as the maximum number of pixels along the first or second axes. Not providing a value indicates that there is no effective limit to the size of the images that can be returned. This is primarily relevant when the imageServiceType is “Cutout” or “Mosaic”, indicating the largest image that can be created. When the imageServiceType is “Atlas” or “Pointed”, this should be specified only when there are static images in the archive that can be searched for but not returned because they are too big. When a service is more fundementally limited by the total number of pixels in the image, this value should be set to the square-root of that number. This number will then represent a lower limit on the maximum length of a side.
maxFileSize	ivoa:integer	optional	The maximum image file size in bytes. Not providing a value indicates that there is no effective limit the size of files that can be returned. This is primarily relevant when the imageServiceType is “Cutout” or “Mosaic”, indicating the largest files that can be created. When the imageServiceType is “Atlas” or “Pointed”, this should be specified only when there are static images in the archive that can be searched for but not returned because they are too big.
maxRecords	ivoa:integer	optional	The largest number of records that the Image Query web method will return. Not providing this value means that there is no effective limit. This does not refer to the total number of images in the archive but rather maximum number of records the service is capable of returning. A limit that is greater than the number of images available in the archive is equivalent to their being no effective limit. (See RM, Hanisch 2007.)
testQuery	Query	optional	a set of query parameters that is expected to produce at least one matched record which can be used to test the service.

Containment

This is contained by VOResource:Service, VOSIcap:capabilities