Sudan coordinate converter
Free Sudan coordinate converter: Adindan datum (EPSG:4201) with UTM zones 35 and 36, plus the heritage Massawa datum — official EPSG parameters with accuracy badges.
Converter
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Collect named points from conversions or a pasted table, see them on the map, convert them all to one system, and download in any format. The list is stored locally in your browser only.
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Coordinate systems in Sudan: quick reference
Topographic and cadastral mapping in Sudan has historically rested on the Adindan datum (EPSG:4201), a regional frame whose origin traces to arc-of-latitude work along the Nile valley that extended across Sudan and neighbouring African states. Because Adindan is a classical datum on the Clarke 1880 ellipsoid, its agreement with WGS84 is only about ±3 metres — a badge we surface honestly on every conversion.
Sudan spans three UTM zones — 35, 36 and 37 — so the common office error is the zone number, not just the datum: Khartoum at about 32.6°E falls in zone 36 (EPSG:20136), western Darfur in zone 35 (EPSG:20135), and the Red Sea east in zone 37. Alongside Adindan, the heritage Massawa datum appears in zone 37 (EPSG:26237) on some older coastal sheets.
The converter below opens on a Khartoum sample point and lists the Sudanese systems first. Enter your coordinates to get the value in every system that actually covers your point — from WGS84 to the Adindan and Massawa grids — each with an explicit accuracy badge.
| EPSG | System | Accuracy |
|---|---|---|
| 4201 | Adindan(geographic) | ±3 m |
| 20136 | Adindan / UTM zone 36N(projected grid) | ±3 m |
| 20135 | Adindan / UTM zone 35N(projected grid) | ±1.4 m |
| 26237 | Massawa / UTM zone 37N(projected grid) | ±0.1 m |
The tool covers 11 systems relevant to Sudan (national systems plus the WGS84 UTM zones) — the table above lists only the key ones.
FAQ
- Which coordinate system does Sudan use?
- The primary datum is Adindan (EPSG:4201) with UTM zones 35 (EPSG:20135) and 36 (EPSG:20136); the Massawa datum (EPSG:26237) appears in zone 37 on older coastal sheets. Modern work is observed on WGS84 and then converted to the required sheet.
- Which UTM zone is Khartoum in?
- Khartoum, at about 32.6°E, sits in UTM zone 36N. Western Sudan and Darfur fall in zone 35, and the eastern Red Sea strip lies in zone 37.
- How accurate is the Adindan datum against WGS84?
- Adindan is a classical datum on the Clarke 1880 ellipsoid, and its difference from WGS84 is on the order of ±3 metres per the published EPSG parameters. That is why we show an estimated accuracy badge next to each conversion rather than claiming absolute precision.
- What is the Massawa datum and why does it appear in Sudan?
- Massawa is a heritage datum tied to the Red Sea coast (EPSG:26237 in UTM zone 37N) and shows up on some older coastal maps in eastern Sudan. The tool supports it for anyone working on those sheets.
- Why does GPS disagree with an old Sudanese sheet?
- GPS observes on WGS84 while the sheet is drawn on Adindan — the two differ by tens of metres depending on region and zone. The tool applies the published EPSG datum shift automatically in both directions.
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