Coordinate Geometry
I mapped a lot of parcels and property lines while employed as a GIS Analyst at the Forest Preserve District of DuPage County from 2005 until 2009.  Here are some Coordinate Geometry calculators that I developed in JavaScript to assist with my mapping.  For each problem, fill in all the purple boxes, click "Calculate", and the solution will appear in the pink boxes. Questions, comments, bugs, etc can be reported here.
Extend/Trim a Line
Extend a line

Extension X =

Extension Y =
X1 = Y1 =

Trim X =

Trim Y =

Trim X =

Trim Y =
X2 = Y2 =

Extension X =

Extension Y =
Extension/Trim Length =

Slope (m) =
Y Intercept (b) =

Intersection of Two Lines
Intersection of Two Lines Line 1-X1 = Line 1-Y1 =
Line 1-X2 = Line 1-Y2 =

Intersectinon - X =

Intersection - Y =
Line 2-X1 = Line 2-Y1 =
Line 2-X2 = Line 2-Y2 =

Line 1
Slope (m) =
Y Intercept (b) =


Line 2
Slope (m) =
Y Intercept (b) =

Intersection of a Line with a Circle
Direction-DistanceStart Point XA = YA =
1st Intersection XP1 = YP1 =
Center of Circle XB = YB =
Radius of Circle =
2nd Intersection XP2 = YP2 =
End Point XC = YC =
Azimuth of AC =
Length of AB =
Azimuth of AB =

Intermediates (cont.)
Angle BAC =
cos BAC =
quadratic formula-b = 		Intermediates (cont.)

Length of AP1 =
Length of AP2 =
Intersection of Two Circles
Direction-DistanceCenter of Circle A XA = YA = Radius of Circle A =
1st Intersection XP1 = YP1 =
2nd Intersection XP2 = YP2 =
Center of Circle B XB = YB = Radius of Circle B =
Intermediates
Azimuth of AB =

Intermediates (cont.)
Length of AB = 		Intermediates (cont.)
Angle A =
Create a Square
Create a Square

Centroid - X =

Centroid - Y =
Corner 1-X = Corner 1-Y =
Corner 2-X = Corner 2-Y =

Corner 3 - X =

Corner 3 - Y =

Corner 4 - X =

Corner 4 - Y =
Area = Angle* = Intermediates
Hypotenuse:
Flying screens
File flowplayer-3.2.9.zip
Version 2012-03-29
Size 112 kB
OS all
What's new in 3.2
Width/Height =

Area provided
Width or Height provided

Complete a Square
Complete a Square Corner 1-X = Corner 1-Y =
Corner 2-X = Corner 2-Y =

Corner 3 - X =

Corner 3 - Y =

Corner 4 - X =

Corner 4 - Y =

Centroid - X =

Centroid - Y =

Lines 1-2,3-4
Slope (m) =

Left
Right

Lines 2-3,3-4
Slope (m) =

Complete a Parallelogram
Complete a Parallelogram Corner 1-X = Corner 1-Y =
Corner 2-X = Corner 2-Y =
Corner 3-X = Corner 3-Y =

Corner 4 - X =

Corner 4 - Y =

Centroid X =

Centroid - Y =

Line 1-2
Slope (m) =
Y Intercept (b) =

Line 2-3
Slope (m) =
Y Intercept (b) =

Complete an Equalateral Triangle
Complete an Equalateral Triangle/Find Centroid Corner 1-X = Corner 1-Y =
Corner 2-X = Corner 2-Y =

Corner 3 - X =

Corner 3 - Y =

Centroid X =

Centroid - Y =

Line 1-2
Slope (m) =
Y Intercept (b) =

Line 2-3
Slope (m) =
Y Intercept (b) =

Line 3-1
Slope (m) =
Y Intercept (b) =

Left
Right
Law of Cosines
Find Angles of an Oblique Triangle Length A = Length B = Length C =

Angle A =

Angle B = Angle C =

 

 

 

Create a Rectangle
Offset a Line Existing Line - Startpoint X = Existing Line - Startpoint Y =
Existing Line - Endpoint X = Existing Line - Endpoint Y =

New Line - Startpoint X =

New Line - Startpoint Y =

New Line - Endpoint X =

New Line - Endpoint Y =

Centroid - X =

Centroid - Y =
Offset/Width =

Left
Right

Existing/New Line Slope
Slope (m) =
Offset Slope
Slope (m) =

Maintained by: Steve Breese Contact Page (last updated: 12-Oct-12)


   
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