"Name"	"Longitude"	"Year"	"Longname"	"City"	"Country"	"Latitude"	"Source"	"Gap"
"G. Jansonius"	17.736	1605	"Jan Jansson"	"Amsterdam"	"Flanders"	52.373056	"Map"	0
"G. Mercator"	19.872	1567	"Gerardus Mercator"	"Leuven"	"Flanders"	50.883333	"Map"	0
"I. Schonerus"	20.638	1536	"Johann Schoner"	"Bamberg"	"Germany"	49.891667	"Astron"	0
"P. Lantsbergius"	21.106	1530	"Phillip van Lansberge"	"Middelburg"	"Belgium"	51.5	"Astron"	0
"T. Brahe"	21.447	1578	"Tycho Brahe"	"Hven"	"Denmark"	55.866667	"Astron"	0
"I. Regiomontanus"	25.617	1463	"Johann Muller"	"Nuremberg"	"Germany"	49.45	"Astron"	1
"Orontius"	26	1542	"Oronce Fine"	"Paris"	"France"	48.866667	"Astron"	1
"C. Clavius"	26.34	1567	"Christoph Clavius"	"Rome"	"Italy"	41.9	"Astron"	1
"C. Ptolomeus"	27.787	150	"Claudius Ptolemaeus"	"Alexandria"	"Egypt"	31.1980556	"Astron"	1
"A. Argelius"	28.17	1610	"Andrea Argoli"	"Padua"	"Italy "	45.4166667	"Astron"	1
"A. Maginus"	29.787	1582	"Giovanni Antonio Magini"	"Bologna"	"Italy"	44.4833333	"Astron"	1
"D. Origanus"	30.128	1601	"David Origanus"	"Frankfurt"	"Germany"	52.3471	"Astron"	1