Free tools for land surveyors

UTM ↔ Lat/Long converterConvert UTM to latitude/longitude and back on WGS 84 / GRS80 datums, with automatic or forced zone, scale factor, meridian convergence and point lists.Open → Area and perimeter from coordinatesPaste the vertices (UTM or lat/long) and get the area in m², hectares and acres, the perimeter, and the bearing and length of every side, with a map.Open → Degrees, minutes, seconds ↔ decimalConvert angles and coordinates between DMS, decimal degrees, degrees and decimal minutes, radians and gons. Accepts lists.Open → Azimuth and distance between two pointsAzimuth, bearing and distance between two points (grid and ellipsoid) and the direct problem: a point from an azimuth and a distance.Open → Traverse closureClosed traverse: angular misclosure, linear misclosure, precision 1:X, Bowditch (compass rule) adjustment and final coordinates of every station.Open → Differential levelingBacksight and foresight readings → height differences and elevations, misclosure, tolerance (mm·√km) and adjustment.Open → Horizontal curve (roads)Tangent, curve length, external distance, middle ordinate and degree of curve; PC and PT stations and a stakeout table by deflection angles (and by coordinates).Open → Cut and fill volume (earthworks)Paste the ground elevation grid, set the platform elevation and the spacing: cut, fill, balance, balance elevation, swell factor and map.Open → Slope and ramp calculatorFind the grade (%), the length or the rise of a ramp with a drawing of the measurements. Also: degrees, 1:x ratio and a grade line by station.Open → Map and drawing scaleConvert lengths and areas between paper and ground at any scale (1:x), find the scale from a known measurement, and see which scale fits your site on an A4 to A0 sheet.Open → KML/KMZ ↔ UTM coordinatesOpen a Google Earth KML or KMZ and see the vertices in UTM and lat/long, with the area and perimeter of polygons and CSV. Or paste coordinates and create a KML.Open → GPS week and day of yearGPS week, day of year (DOY), seconds of week, Julian date and MJD for any date (and back), with a monthly GPS calendar and a live GPS clock.Open → GNSS planner (satellites and PDOP)How many GPS, GLONASS, Galileo and BeiDou satellites are visible at your site, PDOP hour by hour, the sky plot and the best time windows to observe.Open →