I created a shapefile and set the coordinate system to WGS 1984 UTM zone 45N, and I added the base map Imagery with Labels.

I created a line feature with Coordinates of two ends of the runway

  • (27°41'1.694"N 85°21'12.202"E)

  • and (27°42’30.058’’ N 085°21’52.283’’ E)

The line correctly aligns the runway center line, but the direction of the line does not match with the actual direction of the runway .

Example: When I draw a line with the runway length 1339.5m and heading 22° from point(27°41'1.694"N 85°21'12.202"E), the line does not aligns with the runway centerline.

the direction of the runway is 22° from the (27°41'1.694"N 85°21'12.202"E)

closed as unclear what you're asking by PolyGeo Jan 3 '18 at 19:28

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • 1
    Screenshots of the runway and line would probably help, as well as the name of the GIS software you're using. Edit your question to add those things if you have them. – Dan C Jan 3 '18 at 15:34

The heading of 22 degree is probably for the geographic coordinates, not projected coordinates in the UTM zone 45N. The heading varies with every point in a projected system.

You can quickly see the difference in QGIS. First draw a line straight north in the UTM 45N projection. Then draw a line straight north in EPSG4326. The screenshot show the difference.

enter image description here

  • 1
    Additionally, it's not clear where the heading is coming from. But typically the runway names/headings/numbers are also referenced to local magnetic North, not geographic north. – PhilippNagel Jan 3 '18 at 16:39
  • @PhilippNagel Thank you for reminding me about the heading reference, i was taking the geographic heading as the runway direction, but actually runway direction is in Magnetic Heading – jeevan basnyat Jan 5 '18 at 12:54
  • @Dennis Bauszus , I redraw with the projected coordinates considering the magnetic declination , i got the correct heading , anyway thank you very much – jeevan basnyat Jan 5 '18 at 12:56

Not the answer you're looking for? Browse other questions tagged or ask your own question.