1. Internal memory It is a type of hard drive for mobile devices. Here is where all the information, multimedia, and programs are stored. So, the bigger the memory, the more data you can store on your device. Make sure you have around 32 GB of internal memory in your device. When we go out into the field, we tend to collect lots of data, such as pictures and films. Multimedia take up a lot of space and if you run out of it, you will have to halt your field work. Do not forget about all the apps installed on your device. Even if the specs say you have a safe amount of 16 GB of storage, in reality it is probably closer to 11 GB and that seriously limits your flexibility at work. 2. RAM Random-Access Memory (RAM) stores all the data which is currently being used – such as open apps or all of your surveying data. Therefore, the more RAM you have, the more efficient your apps are. In practice, your tMap app is going to work a lot smoother and your maps – as well as all the data – will be displayed much faster. It is worth investing in a device with plenty of RAM – around 3-4 GB. 3. Screen size There is no one correct way to choose a screen, as it fully depends on the user. Those who wish to work more efficiently with maps are going to fully appreciate tablets, while the ones aiming for something more mobile will choose a handheld device with a 5.5- to 6-inch screen and a convenient holder attachment. However, you should definitely pay attention to the height and width of your device. Double-check if you can freely hold it in one hand – it is especially true with tablets. Do not forget to test your screen brightness as well, as it enables working even in very strong sunlight. 4. Durability Surveying in tough weather conditions can be quite a challenge. Depending on the season, our equipment may have to endure rain, scorching sun, or bitter cold. Before buying the device, check if it is weather-proof. Pay close attention to your equipment’s IP (the degree of protection against water and dust). Make sure it can withstand falls and high heat, too! If your device can survive a one-meter fall, has an IP score between 67-68, and operates in temperatures between -4F to 122F , you can be sure it is going to assist you well during your field work. 5. GPS The accuracy of your surveying depends on the in-build GPS. We can divide our equipment into three categories, each with varying degree of accuracy: a) smartphones Smartphones guarantee an around 5-meter accuracy; however, they can be only used outside, with plenty of satellites and no clouds in sight. b) handheld devices Handheld devices offer a 2- to 5-meter accuracy. They combine the features of a smartphone with a GPS‑receiver. Therefore, apart from being more accurate, they can be used as a traditional phone as well, which is very handy during field works. c) external GNSS antennas External GNSS antennas are usually a part of a set, including said antenna, a pole, a mobile app (tMap), and a corresponding device, such as a tablet or smartphone. The phone connects to the antenna via Bluetooth, so even though it is the antenna that pinpoints the exact location, you can work with the maps comfortably from your smartphone. External GNSS antennas are designed for professionals in need of extreme precision, as their accuracy ranges from 1 meter to 1 centimeter. An important element of surveying are the ASG Eupos corrections (for more information on this topic, click here.) 6. Battery life A typical field work day can last anything from 8 to 12 hours. During this (long!) time, your device has to be in peak condition. Throughout the day we use GPS, browse the Internet, look for reception, work with the app… and these eat up your battery. Therefore, when choosing your future field work device, pay attention to its battery life – the longer, the better! The optimal battery capacity should amount to >4000mAh for smaller devices, and >7500mAh for tablets. Remember: the larger the screen, the faster it drains the battery. Some models can have their batteries replaced even in the field. However, regardless of your battery capacity, it is worth to buy a power bank to provide our device with some emergency juice. Better safe than sorry! If you would like to learn about the most popular devices on the market, please visit https://www.tmap.com.pl/sprzet.html. Should you have any questions or doubts, do not hesitate to e-mail me at [email protected]. I am here to help! Check out the tMap app on your smartphone. Author: Urszula Ufa
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