Easycogo for the HP 35s
Easycogo Easycogo
Survey and Hydro Programs and Equations
Perfect for everyday use, and for the exam.

Easycogo for the HP 35s - Purchase Options

HP 35s SURVEY PROGRAM STORES, EDITS AND USES P,N,E,H POINTS!   ( AKA: P,N,E,Z POINTS )

Whether you prefer to have a new, pre-programmed and ready-to-go HP 35s show up at your door, or want to enter the programs into your HP 35s yourself, we have a solution that's right for you.

HP35s

HP 35s
Easycogo Survey Program
Automated Menu
Area/Perimeter by Coordinates
Angle (Azimuth) add/subtract
Angle Traverse/Sideshot
Bearing Traverse/Sideshot
Road/Ditch Volumes
Road Grades
Horizontal Curves-Circular & Spiral
Intersections (Bearings/Distances)
Inverse/Stakeout
Differential Leveling
Store/View/Use PNEH points
Polar/Rectangular Conversions
Vertical Traverse/Stakeout
Triangles (All Solutions)
Vertical Curves

Easycogo Survey Equations Astronomic Observations
Int'l/Survey Ft Conversion
Horizontal Curves
Loans/Depreciation
Ellipse/Ellipsoid
Photogrammetry
Plane/Ground Conversions
Triangles
Spiral Curves
Stadia
Steel Tape Corrections
Swing-on-Line Area Calc.
Vertical Curves
Volumes

Easycogo Hydrology-Hydraulics Program
Hydraulic Radius
Open Channel Velocity & Flow
  (for trapezoid, box or 'V' channels,
  or misc. channel)
Pipe Diameter
Pipe Equivalent Diameter
Pipe Velocity & Flow (Full)
Weir Flow
Weir Head

Easycogo Hydrology-Hydraulics Equations
Hydraulic Radius
Open Channel Velocity & Flow
  (for misc. channel)
Pipe Equivalent Diameter
Pipe Velocity & Flow (Full)
Trapezoid Channel Velocity & Flow
  (for trapezoid, box or 'V' channel)

NEW, PREPROGRAMMED HP 35s with copy of instructions:
I can't wait to save time and money with a new*, pre-programmed HP 35s. Please send me...

    New* HP 35s, Pre-programmed with:
I WANT IT ALL! Easycogo SURVEY AND HYDROLOGY-HYDRAULICS PROGRAMS AND EQUATIONS for $699.00
Easycogo SURVEY PROGRAMS AND EQUATIONS for $469.00
~OR~ I want to CUSTOMIZE my preprogrammed HP 35s by
  FIRST  
starting with the preprogrammed base cost of $80.00 (required)
THEN adding the programs and/or equations of my choice:
Easycogo SURVEY PROGRAM for $329.00
Easycogo SURVEY EQUATIONS for $99.00
Easycogo HYDROLOGY-HYDRAULICS PROGRAM for $199.00
Easycogo HYDROLOGY-HYDRAULICS EQUATIONS for $99.00
~OPTIONAL~

Please email almost free backup PDF's of my ordered programs and/or equations for $10.00

PROGRAMMING INSTRUCTIONS FOR HP 35S ONLY:
I can program my calculator myself (***see estimated programming times below). Please...

    Email PDF of instructions only:
Easycogo SURVEY PROGRAM for $89.00
Easycogo SURVEY EQUATIONS for $29.00
Easycogo HYDROLOGY-HYDRAULICS PROGRAM for $69.00
Easycogo HYDROLOGY-HYDRAULICS EQUATIONS for $29.00
     
    Mail print of instructions only:
Easycogo SURVEY PROGRAM for $89.00
Easycogo SURVEY EQUATIONS for $29.00
Easycogo HYDROLOGY-HYDRAULICS PROGRAM for $69.00
Easycogo HYDROLOGY-HYDRAULICS EQUATIONS for $29.00

If you have calculator(s) that you want us to program for you or don't want to use a credit card, use the Email Order Form.

HP 35s features and information (pdf brochure on HP site)

PayPal Acceptance Mark

What you get:
The Easycogo Survey Program for the HP 35s and the Easycogo Survey Equations for the HP 35s include all instructions and information needed to program the HP 35s, simple step-by-step instructions for using the programs and equations, along with "real-world" type sample maps and problems ideal for program testing, studying, practicing and training. All printed sheets are 3-hole punched for easy placement into a 3-ring binder. All preprogrammed calculator orders also include one FREE set of backup batteries. All options include technical support by email. USPS standard shipping is FREE in continental US.

Questions before you order? Please check our Support page or feel free to contact us at office@easycogo.com

Easycogo Survey Program for the HP 35s
The Easycogo Survey Program contains simple, complete descriptions of all individual programs and easy step-by-step RPN mode instructions to enter all of the programs, which you won't need to do if you purchase the preprogrammed calculator. The entire Easycogo Survey Program is configured to display simple, obvious, survey English text messages for each piece of data before the appropriate data input prompt or output display, so you don't need to remember any obscure codes or values, as you can see in any of the program demo videos. Possibilities for application of the included programs are endless, though a brief summary of the program functionality is as follows:

  • Menu of all included programs, listed in alphabetical order and automatically linked to the appropriate program. No more trying to remember which letter runs the program you need.
  • Area By Coordinates and/or stored points for displaying the area within any coordinated figure bounded by lines. The perimeter of the figure (or length of traverse) is displayed, along with the area in square feet and acres. Also useful for determining areas of figures with curved sides when used with included horizontal curve calculator, or for finding the top and bottom areas of an odd shaped pond or pile for easy volume calculation by average end area (a pond/pile volume equation is available in the Easycogo Survey Equations).
  • Azimuth (Any Angle) Add/Subtract is setup like a simple conversion tool to enable quick, multiple HMS format angle additions and/or subtractions with only a couple button presses.
  • Traverse and Sideshot Horizontally by known bearing or turned angle (right or left with automatic recall or integrated inverse option for back azimuth) from known coordinates and/or stored points, displaying forward azimuth and coordinates and, if desired, carry trig levels with the included and integrated Slope Traverse program and store numbered points with Northing, Easting, and Elevation data. The included option to "stay" or "move up" easily enables traverse or sideshot type entries.
  • Traverse and Sideshot Vertically within or without horizontal traverse with the optionally integrated Slope Traverse program for trig leveling, including input for reference elevation from stored points and instrument and rod height if desired, along with slope distance and zenith angle, displaying the horizontal distance and foresight point elevation. The included option to "stay" or "move up" easily enables traverse or sideshot type entries.
  • Grades from reference or stored point elevation and stations or distances can be used to determine unknown elevations at any station or distance. Also useful for determining elevations from cross-section information or interpolating elevations along any grade from a known elevation.
  • Horizontal Curve calculator for CIRCULAR CURVE and/or SPIRAL CURVE calculations.
    Circular Curve displays virtually every aspect of the circular curve from only two known variables, the four optional combinations being: Radius and Internal Angle (Delta), Radius and Arc Length, Internal Angle and Arc Length, or Arc Length and Degree of Curvature. Displayed results include the radius, arc length, internal angle, tangent, long chord, PC to PT deflection angle from tangent, degree of curvature (arc definition), mid ordinate, external ordinate, and the areas within the sector, fillet and segment. View Demo
    Spiral Curve displays virtually every aspect of the spiral curve from only the length of the spiral and the radius of the adjacent circular arc, including the spiral’s internal angle, A value (flatness), tangent distance to the SC, tangent offset of the SC, deflection angle from the tangent to the SC (tangent-chord angle), chord distance, long tangent distance, short tangent distance, tangent distance to the shifted circular PC, tangent offset to the shifted circular PC, and the velocity (speed) rating in MPH, with the option to display the full Spiral-Curve-Spiral (SCS) tangent length and all associated circular curve data as listed above, from only the SCS tangent deflection angle.
  • Complete Intersection Solutions including intersections from two known coordinates and/or stored points by Bearing-Bearing; Bearing-Distance; and Distance-Distance. If using azimuths, simple azimuth to bearing conversions can be done during the program with a few extra keystrokes. Coordinates of the intersection point or points are displayed and optionally stored. View Demo
  • Inverse between known coordinates and/or stored points to display the bearing, distance and azimuth in the same direction the points are entered. The included option to "stay" or "move up" also enables easy traverse-type inversing or sideshot type stakeout of any number of coordinates and/or stored points by inversing a backsight for a reference azimuth, then inversing desired coordinates and/or stored points for forward azimuth and distance. Use with included Slope Traverse program for easy inclusion of elevation staking. View Demo
  • Leveling tables can be easily completed by using a stored point or entering the reference mark elevation and successive back and fore rod readings, having the instrument height and turning point elevations successively displayed, along with the totals of + and - columns and the elevation difference from the original reference mark being displayed at each turn for easy error analysis.
  • Numbered Points with Northing, Easting, and Elevation data (similar to PNEH format) can be stored, copied, edited, and viewed. No dealing with any complex numbers! All values are displayed as simple numbers, and many of the programs have integrated options to use and/or store point data. Approximately 350 points can be stored with the entire Easycogo Survey Program installed (250 points with Easycogo Survey Equations also installed, or 100 points with the complete set of Easycogo Survey and Hydrology-Hydraulics Programs and Equations.
  • Polar Conversion that was left off of the HP 35s in its typical form is included in the Easycogo Survey Program for the HP 35s, with enhanced surveying functionality. Keeping with the theme of the Easycogo Survey Program, simple text prompts for vertical and horizontal distances result in a vertical angle (in HMS format instead of decimal degrees), and slope distance.
  • Rectangular Conversion, also left off of the HP 35s in its typical form, is included in the Easycogo Survey Program for the HP 35s, with enhanced surveying functionality.  Also keeping with the theme of the Easycogo Survey Program, simple text prompts for a vertical angle (in HMS format instead of decimal degrees) and slope distance result in vertical and horizontal distances.
  • Complete Triangle Solutions for known Area-Angle-Angle; Angle-Side-Angle; Side-Angle-Angle; Side-Angle-Side; Side-Side-Angle; and Side-Side-Side. All Triangle sides and angles are displayed, along with the triangle area in square feet and acres. View Demo
  • Vertical Curve information is easily displayed following input of basic curve parameters of curve beginning station and elevation (or use stored point elevation), in and out vertical tangent grades and length of curve. Information displayed includes the PVT station, PVI station and elevation, K value, high point station if a crest curve or low point station if a sag curve, followed by a repeating prompt for input of any station for display of its on-curve elevation and the grade of the curve at the entered station (useful for calculating appropriate in/out grades for return radii), the initial default being the high or low point station, as applicable. View Demo
  • Volume of roadway or ditch cut or fill by  station or distance, with the ability to enter multiple consecutive cross sections for more complex solutions. The length and volume (cubic feet and cubic yards) of each section is displayed, along with the accumulated length and volume (also in cubic feet and cubic yards). (uses average end area formula)

AS IF THAT WASN'T ENOUGH: Much of the input and resultant data from most of the individual programs will be automatically saved and displayed for optional use in following appropriate input prompts within that program and other subsequently executed programs (until revised by another similar input or calculation), or for easy recall by the displayed alphabetical storage label, even if the calculator was turned off.
Real-world example: You used Inverse to determine the azimuth from point 1 to point 2 before being interrupted by a client. Now you are finally able to continue the job and decide to begin traversing from point 2 to point 3. Since point 3 was located by zenith and slope distance, you select the slope traverse option and enter the appropriate vertical data. You then select the Traverse Horizontal option, in which the prompt for a backsight reference azimuth will automatically display the azimuth from yesterday's inverse for optional acceptance, and the prompt for coordinates to traverse from will automatically show the coordinates of yesterday's input coordinates for point 2. Additionally, the prompt for the horizontal distance to point 3 will be automatically carried over from Slope Traverse and displayed for optional acceptance. Continuing the traverse to point 4 will have much of the appropriate information "moved up" for easy acceptance and continued traversing.

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Easycogo Survey Equations for the HP 35s
The Easycogo Survey Equations program contains contains simple, complete descriptions of all individual equations and their variables, along with easy step-by-step instructions to enter all of the equations, which you won't need to bother with if you purchase the preprogrammed calculator. The entire Easycogo Survey Equations program is configured so that the upper display register will show an easily identifiable title of the equation, while the lower display register will show the actual equation. The equations are programmed in alphabetical order for quick and easy access. The included equations are as follows:

  • Astronomy-Altitude Method-East (AM): Solve for easterly sun/star azimuth, altitude angle, declination angle, or latitude angle (all in HMS format).
  • Astronomy-Altitude Method-West (PM): Solve for westerly sun/star azimuth, altitude angle, declination angle, or latitude angle (all in HMS format).
  • Astronomy-Hour Angle Method-HA>180-East: Solve for bearing to sun/star, local hour angle of sun/star, declination angle, or latitude angle (all in HMS format).
  • Astronomy-Hour Angle Method-HA<180-West: Solve for bearing to sun/star, local hour angle of sun/star, declination angle, or latitude angle (all in HMS format).
  • Conversion-US Survey feet<>Int'l feet: Convert between US Survey feet and International feet.
  • Curve Degree-Arc Definition: Solve for degree of curvature (in HMS format) or radius using the arc definition.
  • Curve Degree-Chord Definition: Solve for degree of curvature (in HMS format) or radius using the chord definition.
  • Curve Length: Solve for internal angle (in HMS format), length of arc, or radius.
  • Depreciation: Solve for depreciation (straight line), cost of item, future value, or years of depreciation.
  • Ellipse Area: Solve for ellipse area, length of semi-major axis, or length of semi-minor axis.
  • Ellipse Flattening: Solve for ellipse flattening, length of semi-major axis, or length of semi-minor axis.
  • Grade-Percent: Solve for beginning elevation, distance between points, end elevation, or percent of grade.
  • Loan Payments: Solve for monthly payment amount, future value (balloon payment), interest rate (APR), loan amount, or number of payments.
  • Photogrammetry-Angular Field of View: Solve for angular field of view (in HMS format), focal length, height of photo, or width of photo.
  • Photogrammetry-Relief Displacement: Solve for relief displacement, flying height, project  datum, height of object above project datum, or radial distance from principal point to object.
  • Plane-Azimuth Conversion (Grid<>Ground): Solve for convergence angle (aka: declination or theta angle), plane (grid) azimuth, or true azimuth (all in HMS format).
  • Plane-Coordinate Conversion (Grid<>Ground): Solve for ground coordinate, offset value, plane coordinate, or scale (combined grid) factor.
  • Right Triangle-Angle: Solve for angle (in HMS format), side adjacent to angle, or side opposite angle.
  • Right Triangle-Side: Solve for either side adjacent to right angle, or side opposite (hypotenuse).
  • Spiral-Deflection Angle to Point on Spiral: Solve for the deflection angle from the tangent to a point on the spiral (POS), length of spiral from the Tangent-Spiral (TS) point to the POS, total length of spiral, or radius of the adjacent circular curve.
  • Spiral-Internal Angle: Solve for the internal angle (delta angle) of spiral, length of spiral, or radius of the adjacent circular curve.
  • Spiral-Velocity (Speed) in MPH: Solve for length of spiral, radius of adjacent circular curve, or design velocity (speed) for vehicles.
  • Stadia-Distance (Horiz) to Foresight: Solve for horizontal distance to foresight point, stadia interval factor, stadia interval (rod intercept), or vertical angle to foresight (in HMS format).
  • Stadia-Elevation at Foresight: Solve for elevation at foresight point, stadia interval factor, stadia interval (rod intercept), instrument measure-up (hi), occupied point elevation, rod height, or vertical angle to foresight (in HMS format).
  • Tape Calibration Correction: Solve for calibration correction, distance measured, length of tape (as marked), or actual length of calibrated tape.
  • Tape Sag Correction: Solve for sag correction, length of unsupported span, pull in field, or weight of tape.
  • Tape Temperature Correction: Solve for temperature correction, distance measured, calibration temperature, or field temperature.
  • Tape Tension Correction: Solve for tension correction, cross-sectional area of tape,  distance measured, modulus of elasticity of tape, pull in field, or pull during calibration.
  • Triangle-Law of Cosines: Solve for any angle (in HMS format), or any one of the three sides.
  • Triangle-Law of Sines: Solve for any angle (in HMS format) or opposite side if another angle (in HMS format) and opposite side are known.
  • Triangle-Size (also Swing on Line): Solve for any angle (in HMS format) between two adjacent sides, one of the adjacent sides, or the area of the triangle.
  • Swing on Line: Solve for the unknown distance along a known line for a specific area, using the distance between two known points and the angle between both known lines.
  • Vertical Curve: Solve for beginning (PVC) elevation, horizontal distance from PVC to a point on curve (POC), elevation of POC, grade of vertical tangent in, grade of vertical tangent out, or total length of vertical curve.
  • Volume of Cone: Solve for cone volume, height, or diameter of base.
  • Volume of Cylinder: Solve for cylinder volume, height, or diameter.
  • Volume of Pond or Pile: Solve for pond or pile volume, bottom area, top area, or depth.

All of the input and resultant data from any equation will be automatically saved under the indicated alphabetical storage label and displayed for optional use in following appropriate input prompts upon re-running the same or another equation and even subsequently executed programs if the same alphabetical storage label is used (until revised by another similar input or calculation), or for easy recall by the displayed alphabetical storage label, even if the calculator was turned off. Easily test variations of the same equation by only changing desired values and quickly accepting any number of previously entered or derived values.

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Easycogo Hydrology-Hydraulics Program for the HP 35s
The Easycogo Hydrology-Hydraulics Program contains a simple, complete description of all individual sub-programs and easy step-by-step RPN mode instructions to enter all of the programs, which you won't need to do if you purchase the preprogrammed calculator. The entire Easycogo Hydrology-Hydraulics Program is configured to display simple, obvious, survey English text messages for each piece of data before the appropriate data input prompt or output display, so you don't need to remember any obscure codes or values, as you can see in any of the program demonstration videos. A brief summary of the program functionality is as follows:

  • Menu of all included sub-programs, listed in alphabetical order and automatically linked to the appropriate sub-program. No more trying to remember which letter runs the program you need.
  • Hydraulic Radius from either pipe diameter, trapezoid channel, box channel, 'V' channel, cross-section area or wetted perimeter.
  • Open Channel Velocity (FS) & Flow (CFS) from Manning's N, hydraulic radius, and grade (option to run integrated Hydraulic Radius program for value from either trapezoid channel, box channel, 'V' channel, cross-section area or wetted perimeter).
  • Pipe Diameter from flow (CFS), Manning's N and grade.
  • Pipe Equivalent Diameter total from unlimited number of pipes.
  • Pipe Velocity (FS) & Flow (CFS) (Full) from pipe diameter, Manning's N and grade.
  • Weir Flow (CFS) from weir head for V-Notch (22.5, 45, 60, and 90 degree). Also enter weir length for Broadcrested and Cipolletti.
  • Weir Head from weir flow (CFS) for V-Notch (22.5, 45, 60, and 90 degree). Also enter weir length for Broadcrested and Cipolletti.

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Easycogo Hydrology-Hydraulics Equations for the HP 35s
The Easycogo Hydrology-Hydraulics Equations program contains simple, complete descriptions of all individual equations and their variables, along with easy step-by-step instructions to enter all of the equations, which you won't need to bother with if you purchase the preprogrammed calculator. The entire Easycogo Hydrology-Hydraulics Equations program is configured so that the upper display register will show an easily identifiable title of the equation, while the lower display register will show the actual equation. The equations are programmed in alphabetical order for quick and easy access. The included equations are as follows:

  • Channel Flow-Trapezoid, Box or 'V' channel: Solve for bottom width, depth of flow, flow (CFS), left side slope, right side slope, coefficient of roughness (Manning's 'N'), or grade of water surface.
  • Channel Velocity-Trapezoid, Box or 'V' channel: Solve for bottom width, depth of flow, left side slope, right side slope, coefficient of roughness (Manning's 'N'), grade of water surface, or velocity (FS).
  • Open Channel Flow: Solve for cross-sectional area of flow, flow (CFS), coefficient of roughness (Manning's 'N'), wetted perimeter, or grade of water surface.
  • Hydraulic Radius: Solve for cross-sectional area of flow, wetted perimeter, or hydraulic radius.
  • Open Channel Velocity: Solve for cross-sectional area of flow, coefficient of roughness (Manning's 'N'), wetted perimeter, grade of water surface, or velocity (FS).
  • Pipe Equivalent Diameter: Solve for one of up to 4 pipe diameters, or the total equivalent diameter.
  • Pipe Flow (Full): Solve for pipe diameter, flow (CFS), coefficient of roughness (Manning's 'N'), or grade of pipe.
  • Pipe Velocity (Full): Solve for pipe diameter, coefficient of roughness (Manning's 'N'), grade of pipe, or velocity (FS).

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Emailed items will be sent to the email address used for your order.
*The new calculator is only removed from the box for programming, then replaced and sent to you with all original package contents.
**Since the Easycogo Survey Program requires most (HP35) or all (HP33) of the entire program stack, you will need to clear it of any program lines, or execute the 'Clear-All' function to restore it to factory settings. Note that using the 'Clear-All' function will also clear the equation stack.
***I understand that the programming process is a manual input process that can be stopped and resumed at any point. I also understand that, not including the time spent learning to program, it will take at least 4 to 8 hours to completely input the Easycogo Survey Program, 1 to 2 hours to completely input the Easycogo Survey Equations, 1 to 2 hours to completely input the Easycogo Hydrology-Hydraulics Program, and 1 to 2 hours to completely input the Easycogo Hydrology-Hydraulics Equations, and though portions of each will function before completion of the input process, they will not function completely as indicated until their input process is finished.

Prices are subject to change without notice. Only purchases in Washington State are subject to your local sales tax. Please read our liability, shipping and return policies.
Visit our Links page for the HP 35s User's Manual, free PDF viewer, and other useful information.

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