GPS Mini Tracker that display maps

In these instances, all the maps and GPS receivers must use the same datum. If the datums are different, the location ends up in two different physical places even though the map coordinates are exactly the same. This is a common mistake: GPS Vehicle Tracking Device use the WGS 84 datum by default, and USGS topographic maps ...

Becoming Familiar with Your New GPS Receiver

After considering all the options, making your list, checking it twice, and finding out which GPS receivers are naughty and nice, you’ve finally come to that blessed event where you’re the proud owner of a GPS receiver. But before you step out the door for a 100-mile wilderness trek or cross-country road trip, intent on relying on ...

How accurate is a GPS receiver

According to the government and GPS receiver manufacturers, expect your GPS unit to be accurate within 49 feet (that’s 15 meters for metric-savvy folks). If your GPS reports that you’re at a certain location, you can be reasonably sure that you’re within 49 feet of that exact set of coordinates. GPS receivers tell you how accurate your ...

GPS Tracker Device wide set of tools

In the Personal GPS Tracker next example of possible methods to represent and analyse GPS locations using the tools provided by PostgreSQL and PostGIS, you can create a grid surface and calculate an estimation of the time spent in seconds by each animal within each ‘pixel’. There are many existing approaches to producing this information; in this ...

Portable GPS sensors usually record other 

Records erroneously attributed to an animal because of inexact deployment information. This case is frequent and is usually due to an imprecise definition of the deployment time range of the sensor on the animal. A typical result is locations in the scientist’s office followed by a trajectory along the road to the point of capture. ...

Our Personal GPS Tracker data set

An important setting is the reference system used to store (and manage) your Personal GPS Tracker data set. In PostGIS, reference systems are identified with a spatial reference system identifier (SRID) and more specifically the SRID implementation defined by the European Petroleum Survey Group6 (EPSG). Each reference system is associated with a unique code. GPS coordinates are ...

Cars and GPS Tracking Device

The management of the association between cars and Personal GPS Tracker can be improved using additional, more sophisticated tools. A first example is the implementation of consistency checks on the gps_sensors_cars table. As this is a key table, it is important to avoid illogical associations. The two most evident constraints are that the same sensor cannot be ...

The potential accuracy of GPS Tracking Devices in real-time

The GPS Navstar satellite transmits a radio signal unique to each individual satellite. The signal is essentially omnidirectional, although there is a preferential orientation toward the Earth since the satellite’s antennas are located on one side of the vehicle which is, of course, aimed at the Earth. For simplicity’s sake, let’s assume that the signal ...

GPS Tracking Device can currently record thousands

The methodological approach and software architecture for managing wildlife tracking data have to meet the specific requirements of spatiotemporal data series which are the result of individual animals’ behaviour. Thus, the first step is the definition of both data and marked animals’ characteristics, as well as the users’ needs. Scalability: Personal GPS Tracker can currently record thousands ...

Portable GPS stands for Global Positioning System

  GPS stands for Global Positioning System, which is a nifty satellite system that tells you your location anywhere on planet earth. This part is all about GPS. We’ll start with a broad overview of the satellite system and work our way back down to earth and discuss handheld, consumer Portable GPS. By the end of ...