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Source file
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Identify coordinate columns
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Coordinate reference systems
Sourcefrom
ETRS89 / NTM zone 13
EPSG:5113
units: meters · projected
Targetto
ETRS89 / UTM zone 33N
EPSG:25833
units: meters · projected
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Norwegian Transverse Mercator (NTM) is a series of narrow, one-degree zones designed for high-accuracy surveying across Norway, preserving distances to millimetre precision near the central meridian. This converter transforms NTM coordinates to UTM zone 33N (EPSG:25833), the standard projected CRS for most Norwegian GIS workflows.
Map. Analyze. Convert.NTM uses one-degree-wide zones centred on each half-degree meridian, compared to UTM's six-degree zones. The narrower zones dramatically reduce distortion — distances and areas within a few kilometres of the central meridian are preserved to millimetre accuracy. This makes NTM the preferred system for cadastral surveying, infrastructure projects, and anything where sub-centimetre precision matters.
EPSG codes run from 5105 (zone 5) to 5130 (zone 30), one per half-degree of longitude across Norway. Converting to UTM 33N unifies the data into a single zone suitable for regional mapping, web display, or further conversion to WGS84. Because NTM and UTM 33N share the ETRS89 datum, the conversion is a pure projection change — no datum shift — so no accuracy is lost in the process.
Batch conversion is typical here: surveyors deliver measurement plans in NTM, and downstream GIS systems expect UTM. Upload the spreadsheet, pick the NTM zone that matches your data, and export the converted file.