Includes a screen map image if current location shows on map.Įmail queued in your out box. Stitching will still function on older devices, but map display updating may be too slow for convenient use due to the limited processing power. Map stitching works best with the iPhone 4S and later, the 3rd and later generation iPads (including the iPad mini), or the 5th and later generations of the iPod touch. They can be stitched to any other current US Forest Service map, but not to another kind of map. Thus map stitching will work between a 2013 USFS map and a USGS map in every state except California.Ĭurrent US Forest Service maps use the Geographic map projection. So if you want to see a mix of maps with different scales stitched together, select a map with the lowest desired scale and let the app stitch in the appropriate maps with higher scales where no map of the desired scale is available.Ģ013 Forest Service maps use the UTM map projection for all states. If you are viewing a selected 100K map, no 24K maps will be shown. If you are viewing a selected 250K map, no 24K, 50K or 100K maps will be shown. When multiple options are available to stitch, iHikeGPS will pick the available map which is closest in scale to the main selected map. A 24K map, a 50K map, a 63K map, a 100K map and a 250K map can all stitch together. Map Stitching works even for maps of different scales as long as the map projection is the same. USGS map stitching works anywhere within California, but it will not work across the California borders with Oregon, Nevada and Arizona. Thus UTM map stitching won’t work across the black lines shown on this map of UTM zones.Ĭalifornia USGS maps use the Albers Conic map projection instead of UTM. Most USGS maps, and all NRC and 2013 USFS maps use the Universal Transverse Mercator (UTM) map projection, which changes when you cross the boundary line between two UTM zones due to the curvature of the earth. Right Edge of Zone 12 Left Edge of Zone 13 Map Stitching Limitations The actual heading error will be greater than the displayed accuracy if near magnetic material such as steel. If this does not improve the estimated error, then move farther away from all other electrical devices and metal, and repeat. Rotate the device in several different ways so that each of the 6 arrows will at some time be aimed at every area on an imaginary sphere surrounding you. Imagine arrows sticking out of all 4 sides and the front and back of your device. When the Heading Accuracy text turns red, recalibrate the internal compass to improve the heading accuracy. Therefore your indicated position may be off. When the accuracy text for Location, Elevation or Course turns red with a yellow background, the GPS satellite signals are not being received properly. When Record Track is switched to Off, the information can still be viewed at the bottom of the Track screen. If the Track Timer & Odometer are visible, then track recording is on. If for some reason (such as you went through a tunnel) a track was not actually recorded for the whole time, the straight line distance between the two track points on either side of the recording gap is used. The Odometer shows the distance travelled during that time. The Track Timer shows hours:minutes since you turned on track recording. The background color of the Estimated Time of Arrival changes according to the sun's position to warn you if you will be arriving after the sun sets at your destination. The ETA shows the time in the current time zone even if the destination is in another time zone.
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