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Fig. 3

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Sky distribution of the segmented sources in the fourth (top), third (bottom left), and first (bottom right) Galactic quadrants. Extragalactic sources are depicted as grey crosses. Galactic and unclassified sources are represented by circles, coloured by source type (blue=unclassified, bluish green=HII region, magenta=SNR, orange=PN, green=LBV, and brown=WR). Sources with multiple classification tags are not shown. Note the different Galactic longitude coverage in each panel. The source distribution in the fourth quadrant shows a latitude jump around l = 300° due to the SMGPS footprint following the Galactic warp. Sources with an angular radius of less than 10 arcmin are represented with points of fixed size for easier visualisation. Larger sources are represented with larger circles (scaling ∝r1.2). The histograms to the top and right of each panel represent the marginal distribution of sources in each direction (for the first and third Galactic quadrants, the cumulative latitudinal distribution is shown).

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