A coordinate output method comprising: estimating (S803, S1303) current coordinates of a moving body based on previous coordinates of the moving body and information on a speed of the moving body; calculating (S804, S1304) the current coordinates of the moving body as either of a fix solution or a float solution by executing interferometric wave positioning based on positioning data of a base station installed at a predetermined point and positioning data of positioning station placed on the moving body; outputting (S805, S1305) the current coordinates of the moving body calculated as the fix solution in a case where the current coordinates of the moving body are calculated as the fix solution; characterized by determining (S807, S1307) a time during which the current coordinates of the moving body have been continuously calculated as the fix solution; and outputting (S818, S1318) the current coordinates of the moving body estimated from the information on the speed in a case where both a) the time during which the current coordinates of the moving body have been continuously calculated as the fix solution is equal to or more than a first predetermined time, and b) the current coordinates of the moving body are not calculated as the fix solution; and outputting (S816, S1316) the current coordinates of the moving body calculated as the float solution in a case where both a') the time during which the current coordinates of the moving body have been continuously calculated as the fix solution is less than the first predetermined time, and b) the current coordinates of the moving body are not calculated as the fix solution. estimating (S803, S1303) current coordinates of a moving body based on previous coordinates of the moving body and information on a speed of the moving body; calculating (S804, S1304) the current coordinates of the moving body as either of a fix solution or a float solution by executing interferometric wave positioning based on positioning data of a base station installed at a predetermined point and positioning data of positioning station placed on the moving body; outputting (S805, S1305) the current coordinates of the moving body calculated as the fix solution in a case where the current coordinates of the moving body are calculated as the fix solution; determining (S807, S1307) a time during which the current coordinates of the moving body have been continuously calculated as the fix solution; and outputting (S818, S1318) the current coordinates of the moving body estimated from the information on the speed in a case where both a) the time during which the current coordinates of the moving body have been continuously calculated as the fix solution is equal to or more than a first predetermined time, and b) the current coordinates of the moving body are not calculated as the fix solution; and outputting (S816, S1316) the current coordinates of the moving body calculated as the float solution in a case where both a') the time during which the current coordinates of the moving body have been continuously calculated as the fix solution is less than the first predetermined time, and b) the current coordinates of the moving body are not calculated as the fix solution.