Montage Viewer: Overlays

import astroMontage.mViewer as mv

viewer = mv.mViewer()

viewer.set_red_file("SDSS_r.fits")
viewer.set_red_stretch("0.1s", "max", "gaussian-log")

viewer.set_green_file("SDSS_g.fits")
viewer.set_green_stretch("0.1s", "max", "gaussian-log")

viewer.set_blue_file("SDSS_u.fits")
viewer.set_blue_stretch("0.1s", "max", "gaussian-log")

viewer.set_current_color("8080ff")   
viewer.add_grid("Equ J2000") 

viewer.set_current_color("90ff90")        
viewer.add_img_info("mipssed.tbl")

viewer.set_current_color("ff9090")        
viewer.add_img_info("irspeakup.tbl")

viewer.set_current_color("ffff00")      
viewer.set_current_symbol(1.0, "circle")  
viewer.add_catalog("fp_psc.tbl", "j_m", 16, "mag") 

viewer.set_current_color("ffffff")      
viewer.add_label(202.47083, 47.26614, "Messier 051b")

viewer.set_current_color("000080")      
viewer.set_current_symbol(8.0, "circle")
viewer.add_marker(202.49829, 47.26614) 

viewer.set_current_color("ffffff")      
viewer.add_label(202.41667, 47.21667, "Messier 051a")

viewer.set_current_color("000080")      
viewer.set_current_symbol(12.0, "circle")
viewer.add_marker(202.46963, 47.19517) 

viewer.init_browser_display()

In addition to the commands to add each type of overlay (all of which can have multiple instances) there are a couple of "sticky" command to set the color and symbol shape for any subsequent overlays until changed. Since we can't assume the user has access to a network at all times, we haven't opted for allowing object name resolution inside the methods here; all coordinates are in simple decimal degrees.