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Using Aladin prototype v10 (6/6/2017) and TOPCAT v4.4 on MacOS
- See also page: Aladin & planetary surfaces for older use cases / examples.
Standard planetary mapping in TOPCAT
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• Standard setup for planetary maps in TOPCAT SkyPlot is:
(in Axes / Projection)
Projection = sin (i.e. sphere, spherefor orthographic), but car (cylindrical) is also possible
Uncheck Reflect longitude axis,
View Sky System: Equatorial,
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• Standard setup for planetary maps in TOPCAT PlanePlot is(cylindrical):
(in Axes / Range)
Set Max X value to 360
Central meridian will be on left side
• To put Central the central meridian at the center:
(in Axes / Range)
Min / Max X = -180 / 180
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• Add new synthetic column providing healpix cell number (right-click on table column header and enter new column description):
healpixNestIndex( 6, longitude, latitude )
(adapt scale to data in use, 6 provides a resolution of ~ 1° at the Equator)
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- send as s_region from VESPA client (to Aladin) — (s_region is currently provided in this service with W longitudes, so this will workproject correctly)
- select them in Aladin with pointer
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- You can save it from File > Export Planes (save preferably as fits for reuse)
This worksis OK and very quick.
• Then: test intersections with something else.
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