State Plane Coordinates with Cheap Handheld GPS Receiver
Settings for Texas Coordinate System
BTW here are the settings for a 2-Parallel Lambert User Grid projection that, when chosen as the primary coordinate system, will display Texas Coordinate System of 1983 coordinates (in US Survey Feet), and allow entry of waypoints in those coordinates as well.
Settings for User Defined Coordinate System (2-Parallel Lambert Projection) in Magellan SportTrak and Meridian
Handheld GPS receivers to give State Plane Coordinates in US Survey Feet
Texas 4201
North Zone
NAD83, US Survey feet
Long of origin= -101.5
Lat of origin= 34
Std parallel1= 36.1833333333
Std parallel2= 34.65
SF= 1
Unit to meters= 0.30480061
False East at origin= 0656166.6667
False North at origin= 3280833.333
Texas 4202
North Central Zone
NAD83, US Survey feet
Long of origin= -98.5
Lat of origin= 31.6666666667
Std parallel1= 33.9666666667
Std parallel2= 32.1333333333
SF= 1
Unit to meters= 0.30480061
False East at origin= 1968500
False North at origin= 6561666.667
Texas 4203
Central Zone
NAD83, US Survey feet
Long of origin= -100.3333333333
Lat of origin= 29.6666666667
Std parallel1= 31.8833333333
Std parallel2= 30.1166666667
SF= 1
Unit to meters= 0.30480061
False East at origin= 2296583.333
False North at origin= 9842500
Texas 4204
South Central Zone
NAD83, US Survey feet
Long of origin= -99
Lat of origin= 27.8333333333
Std parallel1= 30.2833333333
Std parallel2= 28.3833333333
SF= 1
Unit to meters= 0.30480061
False East at origin= 01968500
False North at origin= 13123333.33
Texas 4205
South Zone
NAD83, US Survey feet
Long of origin= -98.5
SF= 1
Unit to meters= 0.30480061
Lat of origin= 25.6666666667
Std parallel1= 27.8333333333
Std parallel2= 26.1666666667
False East at origin= 984250
False North at origin= 16404166.67
Deralski
I must have missed that memo.
Which "sub-meter el-cheapo" units are you referring to?
Loyal
Advantages of Rectangular Coordinates
> Then when I want to navigate to a point I hand enter the LL using the height that's in there from the unit.
One advantage to working in rectangular coordinates is that you can take them directly from the handheld to do COGO and then input the results directly as waypoints for further seach. The initial search positions are fine, but as you start finding stuff, almost invariably new, refined search coordinates are needed.
Settings for Texas Coordinate System-Loyal
I suppose I should qualify that a bit. Maybe not recreational grade units but mapping units.
I've done submeter and sometimes centimeter level results with some pretty cheap units compared to survey grade stuff which comes at a much higher costs.
Correct for the 60 day, the offset from ITRF and NAD and you can get there in most cases with a unit under 2,000.
As long as you understand your tool and what it is showing you then it's not all that hard to make the shift to something worthwhile.
Deral
(Sharpening up the darts now)
Deralski
convert your spc to lat long and most smart phones do pretty scarily close. Or at least my T Mobile one does. I do not know about sub meter, but it has been running pretty close to meter level for me.
Deral
Okay...
A grand is a LOT cheaper than "survey grade," but hardly "el cheapo" to us CHEAPSKATES!
🙂
Loyal
