Help

Getting started

The tools are meant to be used in order on a job, but each one also works on its own.

1. Traverse & area. Enter or import the bearings and distances, check the closure, and read off the adjusted coordinates and area.
2. Subdivision (if the job is a split). Divide the lot into parts of the areas you want.
3. Technical description and Survey plan. Use the button on the traverse (or subdivision) results to carry the courses across, then add the lot details.
4. Requirements checklist and Letters & notices. Keep these open while the job runs.

Everything runs in your browser. Nothing you type is uploaded. Results are an aid to your own checking, not a substitute for field verification or your signature and seal.

Traverse & area

To compute a lot

1. Name the job, choose the bearing format (quadrant such as N 45°30' E, or azimuth), and set the required precision your order or manual asks for.
2. Enter each course as a bearing and a distance. You can type them, use Paste courses (one per line, bearing then distance), or Import file for CSV, DXF, LandXML or Leica GSI files.
3. Choose the correction: compass rule, transit rule, least squares, or none.
4. Read the closure, the adjusted courses, the coordinates, the plot, and the area. The area is computed by coordinates and checked against the double meridian distance (DMD) method.

Tie, shared corners and common boundaries

• Tie to corner 1. Tie the lot to a monument, or to a corner of an adjoining lot. If the tie point has coordinates, corner 1 starts on them.
• Shared corners. Adopt an adjoining lot's approved corner and hold it fixed. The adjustment closes onto it and never moves it.
• Common boundaries. Enter the approved plan's bearing and distance for a line you share. The suite compares them with yours and flags differences beyond the tolerances you set.

Choosing the correction

• Compass rule: shares the misclosure out in proportion to line length. A sound default for angles and distances measured to similar quality.
• Transit rule: shares it in proportion to the size of each line's latitude and departure.
• Least squares: weighs distances and bearings by the errors you state, and reports residuals, a chi-square test and error ellipses. Use your instrument's stated precision.
• None: leaves the figures as measured so you can see the raw misclosure. Not available while a corner is held.

Carrying the result forward

Use the buttons under the results to send the courses to the Technical Description or the Survey Plan, copy a summary, or download CSV and DXF files.

Subdivision

Divides a lot into parts of an area you choose, and closes every new lot exactly on the parent's adjusted coordinates.

1. Under The parent lot, use the traverse you last computed, or paste courses. A pasted lot is closed by the compass rule.
2. Pick a method and fill in its fields, then choose which corner the first lot should hold.
3. Press Compute the division. You get the lots, the cut lines, a plot, and a check that the areas add up to the parent.

By area

Cut lines run parallel to a bearing you give. Enter the areas to cut off, for example 400, 400. The first lot is taken beside the corner you chose, then the next, and the leftover becomes the last lot.

Through a point

One straight cut through a corner, or through a point you enter by coordinates, placed so the part holding your chosen corner has the area you give. If two different lines give that area you can pick between them. If no line can, the message states the range of areas that is possible from that point.

Line offset

Takes a strip of the width you enter off one side, parallel to a chosen course, such as a road widening, easement or setback. The strip is the first lot and the rest is the remainder. Offsets run inward only.

Each new lot lists its corners, the bearing and distance to the next corner, coordinates and area. Use Use in Technical description to carry a lot across. The page keeps the parent lot, so you can come back for the next lot. Cuts are straight lines; if one crosses an irregular boundary at more than two points you will see a warning to check the plot.

Technical description

1. Fill in the lot, block, plan number, barangay, city or municipality and province.
2. Bring in the courses with Keep linked to the Traverse tool, paste them, or type them. Each line's neighbour (the bounding line) is worked out from the bearings, and you can change any of them.
3. Choose whether the area is computed or entered by you, and how many decimals to show. The area is also written in words.
4. Add the tie to the reference monument, the corner monuments and the dates you need.
5. Edit the wording freely, then copy it or download it as a Word file.

If shared corners or common lines were set up on the traverse page, the description and notes state them for you, for example that a line is common with an adjoining lot.

Survey plan

Draws the lot with bearings, distances and the tie line, with the lot data, area in words, standard notes, and the certification, approval and seal blocks. Load the courses from the traverse, complete the sheet entries, then print on A3 or A4, or download the sheet as SVG or the lot as DXF. Shared corners are marked and common lines appear in the notes.

Check the sheet against the current DENR-LMB requirements for your region before submission.

Requirements checklist

A working list from engagement to release for each kind of survey: subdivision, consolidation, relocation and original survey. Choose the type, give the job a name, and tick items off as they are done. You can add your own items. Use Save job: each job's progress is kept on this device and you can reopen it later. Requirements differ by office and change over time, so confirm them with your regional office.

Letters & notices

Choose a document: the notice to adjoining owners (with a receipt slip), the transmittal letter, the request for records, a quotation, or a statement of account. Fill in your own details once, then the fields for the document. Copy the text, download it as a Word file, or print it.

Glossary

Quadrant bearing

A direction written from north or south toward east or west, for example N 45°30' E. The angle is never more than 90°.

Azimuth

A direction measured clockwise from north, 0° to 360°.

Error of closure (linear error)

The gap between where the traverse ends and where it began. It should be zero for a perfect closed lot.

Precision ratio

The perimeter divided by the error of closure, written 1 : N. A larger N is better. It is compared with the precision your order requires.

Latitude and departure

The north-south and east-west parts of a course.

Compass and transit rules

Two classical ways of sharing the error of closure among the courses.

Least squares

An adjustment that weighs each observation by its stated error and finds the best fit for all of them together.

Residual

How far an adjusted observation moved from what was measured.

Chi-square test

A check of whether the misfit after a least-squares adjustment is consistent with the errors you stated.

Double meridian distance (DMD)

An older way of computing area from departures and latitudes. The suite uses it to check the coordinate area.

Shared corner

A corner already established by the approved plan of an adjoining lot, held fixed instead of adjusted.

Common boundary

A line shared with an adjoining lot, compared against the approved plan.

Tie line

The bearing and distance from a reference monument to corner 1 of the lot.

Pivot

The point a cut line is made to pass through in the Subdivision tool.

Offset

A line parallel to a course, set a given distance inside the lot.

Remainder

What is left of the parent lot after the other lots have been cut off.

PRS92

The Philippine Reference System of 1992, the grid used for coordinates.

Saving & backup

Jobs, ties and drafts are saved in this browser on this device. That keeps them private, but they do not follow you to another computer and they are lost if browsing data is cleared.

• Use Back up to a file at the bottom of any page to download everything as one file ending in .survey.
• Use Restore from a file to load it again on any device. You can add to what is already there or replace it.
• The suite reminds you when changes have gone a week without a backup.

The tooltip setting is a display preference and is not part of the backup.

Tooltips

A small ? beside a field explains it. Hover over it, tab to it, or tap it to read the tip; press Esc or tap elsewhere to close it. Buttons show their tip when you hover over or focus them.

The Tips switch at the top right of every page turns them all on or off. The choice is remembered on this device. They never print.

Troubleshooting

The closure is poor, or the adjustment will not settle.

Look first for a wrong quadrant (N instead of S, E instead of W), a transposed digit, or a missing course. Compare the plot with your sketch.

The subdivision says no line gives that area.

The message names the range possible from that point. Pick a different point, or an area inside that range.

The subdivision page says no traverse has been computed.

Compute a traverse first, or choose Courses I paste here.

My saved work is gone.

Browsers clear saved data when you clear browsing data, or in a private window. Restore from your last backup file.

An import file will not read.

Only text files, ASCII DXF, LandXML and Leica GSI are read. Export CSV from your instrument or save the drawing as an ASCII DXF.