.

Geoinformatics_03-2009
product review gps product review trimble juno sc handheld gps is becoming more and more the standard tool for data collection, but also for navigating to a certain object in the field. whereas for data collection the required accuracies need to be relatively high to create a dataset that is positionally correct, this does not have to be the case for simply updating attribute data in the field or in order to navigate to a certain object. by huibert-jan lekkerkerk ith the price of survey grade receivers relatively high it is an expensive job to equip everybody with his / her own personal gps unit. an alternative would be to purchase consumer type receivers but these rarely support the software needed. as an alternative, manufacturers develop low-end gps units that still suit professional needs. one of the latest of these to come to the market is the juno handheld from trimble. this review will focus on the juno sc handheld version, which is identical to the less expensive juno sb handheld that lacks the 3.5g w cellular communications options provided with the juno sc handheld. the unit has been tested together with trimble terrasync software. the juno sc handheld is equipped with just about any form of communication one needs nowadays. there is no rs232 port, but these can be considered obsolete by now. the juno sc model is equipped with a 3.5g cellular modem, which we did not test. the sim card for this slot can be easily inserted / extracted as it is located under a rubber cover next to the micro sd card that trimble has chosen for memory expansion. the upside of using a high capacity microsd card is that you, when using the juno sc handheld for mapping, will probably never run out of memory. the downside is that the microsd card requires an additional adapter when inserted into e.g. a pc. receiver the receiver is based on a typical pda type handheld. as a result, all controls and interfaces are quite familiar to any other windows based pda. as a result the main user interface is the colour touch screen in addition to a few hardware keys. as a result typing has to be performed using the on-screen keyboard. camera the juno sc handheld is equipped with a 3 megapixel colour camera with auto focus. the camera is of the type typically found in mobile devices and has no flash. as a result it is hardly usable under dark conditions, but outside in broad daylight it functions well enough. the april/may 2009 6
Powered by fluidbook tm