This project involves an inventory of honeylocust trees on a section of Texas Tech University. 2007:22) as they improve air quality, reduce temperatures in warm climates, cleanse the particulate air pollution and create outdoor learning environments. Introduction The ecological role of trees within an urban and learning environment is now widely recognized (Nowak et al. The device is more effective with slightly lower EPE values when most trees have shed leaves (autumn) so as to minimize multipath errors resulting from the canopies.ġ.

Garmin GpsMap 76csx is suitable for trees in an urban environment. GIS/GPS integration in conventional tree data collection methods helps in generating valuable information that boosts the management of the urban forest. The largest honeylocust tree had a girth of 300cm, DBH of 95.5cm and about 75 years old while the smallest measured 29.6 cm in circumference, DBH of 9.4 cm and about 7 years old. This show that the device was fairly accurate in locating the trees. The trees exhibited statistically significant clustering patterns (p <.05, Z =-5.28) and the Estimated Position Error (EPE) ranged from 4 to 7 meters with a mean of 4.6 meters. The results indicate that most honeylocust trees were planted around the administration and Agriscience buildings, the Commons Food Court and near the corner along 19 th street. A map was generated in ArcMap to aid the examination of tree positional accuracy. Data were collected from 85 honeylocust trees and analyzed using ArcMap (average nearest neighbor tool) and a conventional method of estimating age. The inventory involved the use of a GPS receiver, Garmin GPSmap 76CSx, and a diameter tape.

If you look in the outlet section of their website, they have some older devices at very nice prices - even under $200.This study was intended to ascertain the suitability of Garmin GpsMap 76csx for use in urban tree inventory. Anyway, you might check them out, as they should have excellent map options for Spain. They are having a Black Friday sale through the weekend, am trying to decide whether to pull the trigger on their Trail2 handheld. Their CompeGPS Land software for Mac/Windows is also very nice and lets you import/export maps in a variety of formats. There are lots of maps available for the EU, and openstreetmap and TomTom for the US.

But TwoNav supports several open-source formats and is not 'locked down' in the same way as Garmin devices. The map formats are not compatible with Garmin - which is fine with me, since I make my own maps anyway. I am thinking about buying one of their handheld GPS units to replace my broken Garmin Montana. are you familiar with TwoNav? They are based in Spain and make some pretty cool dedicated GPS units and apps for all platforms.

Garmin 76csx maps