A geodetic system comprising a geodetic surveying instrument, at least one target, and a computing system, each of the at least one target - comprising a light emitter configured for emitting any of n predetermined modulated light patterns (MLPs), - being assigned to one of m global identification references, wherein m > n, and - being configured for transmitting and/or receiving data based on the GIR to which it is assigned, the geodetic surveying instrument comprising - an optical sensor configured for receiving the MLPs, - an analogue-to-digital converter configured for converting any of the MLPs into digitised signals, the computing system being configured for o transmitting and/or receiving data based on a GIR, o receiving data based on the digitised signals, o selecting one of the at least one target or receiving a selection of one of the at least one target, the selected target being assigned to a selected GIR, o temporarily assigning to the selected GIR one of n local identification references (LIRs), wherein each of the n LIRs is corresponding with one of the n MLPs, o directing the light emitter of the selected target to emit an MLP corresponding with the assigned LIR, ∘ based on interpreting the digitised signals, detecting the assigned LIR, ∘ outputting a signal indicative for the detection of the selected target based on the detected assigned LIR, characterized by - each of the at least one target being permanently assigned to the corresponding GIR. - the MLP being sent out with a frequency between 100 kHz and 1 MHz, - the ADC having a sampling rate of at least 40 MHz, - the OS having an elevation field of view between 30° and 180°, - the OS having an azimuth FOV between 0.1° and 2°. each of the at least one target - comprising a light emitter configured for emitting any of n predetermined modulated light patterns (MLPs), - being assigned to one of m global identification references, wherein m > n, and - being configured for transmitting and/or receiving data based on the GIR to which it is assigned, - comprising a light emitter configured for emitting any of n predetermined modulated light patterns (MLPs), - being assigned to one of m global identification references, wherein m > n, and - being configured for transmitting and/or receiving data based on the GIR to which it is assigned, the geodetic surveying instrument comprising - an optical sensor configured for receiving the MLPs, - an analogue-to-digital converter configured for converting any of the MLPs into digitised signals, - an optical sensor configured for receiving the MLPs, - an analogue-to-digital converter configured for converting any of the MLPs into digitised signals, the computing system being configured for o transmitting and/or receiving data based on a GIR, o receiving data based on the digitised signals, o selecting one of the at least one target or receiving a selection of one of the at least one target, the selected target being assigned to a selected GIR, o temporarily assigning to the selected GIR one of n local identification references (LIRs), wherein each of the n LIRs is corresponding with one of the n MLPs, o directing the light emitter of the selected target to emit an MLP corresponding with the assigned LIR, ∘ based on interpreting the digitised signals, detecting the assigned LIR, ∘ outputting a signal indicative for the detection of the selected target based on the detected assigned LIR, o transmitting and/or receiving data based on a GIR, o receiving data based on the digitised signals, o selecting one of the at least one target or receiving a selection of one of the at least one target, the selected target being assigned to a selected GIR, o temporarily assigning to the selected GIR one of n local identification references (LIRs), wherein each of the n LIRs is corresponding with one of the n MLPs, o directing the light emitter of the selected target to emit an MLP corresponding with the assigned LIR, ∘ based on interpreting the digitised signals, detecting the assigned LIR, ∘ outputting a signal indicative for the detection of the selected target based on the detected assigned LIR, characterized by - each of the at least one target being permanently assigned to the corresponding GIR. - the MLP being sent out with a frequency between 100 kHz and 1 MHz, - the ADC having a sampling rate of at least 40 MHz, - the OS having an elevation field of view between 30° and 180°, - the OS having an azimuth FOV between 0.1° and 2°. - each of the at least one target being permanently assigned to the corresponding GIR. - the MLP being sent out with a frequency between 100 kHz and 1 MHz, - the ADC having a sampling rate of at least 40 MHz, - the OS having an elevation field of view between 30° and 180°, - the OS having an azimuth FOV between 0.1° and 2°.