AIS visualization TASK - Revision history

Mol: /* Plan */

2026-05-15T15:15:22Z

Plan

← Older revision		Revision as of 18:15, 15 May 2026
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	## Compute homography matrix		## Compute homography matrix
	# For testing purposes plot the GNSS value on the map.		# For testing purposes plot the GNSS value on the map.
	##		## Create other homology mapping between GNSS coordinates and the map
			###

	=== UTM projection ===		=== UTM projection ===

2026-05-15T15:09:07Z

Plan

← Older revision		Revision as of 18:09, 15 May 2026
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	## Convert GNSS coordinates to UTM and then to metric points. Change the origin such that the metric numbers are reasonable.		## Convert GNSS coordinates to UTM and then to metric points. Change the origin such that the metric numbers are reasonable.
	## Find the corresponding pixels at the photo image.		## Find the corresponding pixels at the photo image.
			## Compute homography matrix
			# For testing purposes plot the GNSS value on the map.
			##

	=== UTM projection ===		=== UTM projection ===

2026-05-15T15:08:06Z

Plan

← Older revision		Revision as of 18:08, 15 May 2026
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	=== Plan ===		=== Plan ===

			The coordinate system of the map is WGS84 EPS:4326 to EPSG:32635.

	The mapping and ideas		The mapping and ideas
	# Get the mapping ship's GNSS coordinates to image coordinates		# Get the mapping ship's GNSS coordinates to image coordinates
			## Convert GNSS coordinates to UTM and then to metric points. Change the origin such that the metric numbers are reasonable.
			## Find the corresponding pixels at the photo image.

	=== UTM projection ===		=== UTM projection ===

2026-05-15T15:02:18Z

Plan

← Older revision		Revision as of 18:02, 15 May 2026
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	=== Plan ===		=== Plan ===

			The mapping and ideas
			# Get the mapping ship's GNSS coordinates to image coordinates

	=== UTM projection ===		=== UTM projection ===

2026-05-15T14:59:09Z

UTM projection

← Older revision		Revision as of 17:59, 15 May 2026
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	The latitude/longitude scale is not a linear measure. Thus, to a conversion to metric scale is better. UTM projection (pyproj) or using a local tangent plane. The UTM projection works better for this 10-20 km distances.		The latitude/longitude scale is not a linear measure. Thus, to a conversion to metric scale is better. UTM projection (pyproj) or using a local tangent plane. The UTM projection works better for this 10-20 km distances.

			=== Plan ===

	=== UTM projection ===		=== UTM projection ===

2026-05-15T11:46:24Z

UTM projection

← Older revision		Revision as of 14:46, 15 May 2026
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	=== UTM projection ===		=== UTM projection ===

			The latitude/longitude scale is not a linear measure. Thus, to a conversion to metric scale is better. UTM projection (pyproj) or using a local tangent plane. The UTM projection works better for this 10-20 km distances.

	<syntaxhighlight lang="python">		<syntaxhighlight lang="python">

2026-05-15T11:45:53Z

UTM projection

← Older revision		Revision as of 14:45, 15 May 2026
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	=== UTM projection ===		=== UTM projection ===

			<syntaxhighlight lang="python">
			# WGS84 GPS -> UTM zone 35N
			transformer = Transformer.from_crs(
			"EPSG:4326",
			"EPSG:32635",
			always_xy=True
			)


			gps_points = np.array([
			[59.4480442,24.7727679],
			[59.4720746,24.7267166],
			[59.5183884,24.7962952],
			[59.5226077,24.5841614],
			[59.5770763,24.7294084]
			])

			utm_points = []
			for lon, lat in gps_points:
			x, y = transformer.transform(lon, lat)
			utm_points.append([x, y])

			x0, y0 = utm_points[2]
			local_points = []
			for x, y in utm_points:
			local_points.append([x - x0, y - y0])

			print(local_points)
			</syntaxhighlight>

	=== Homology ===		=== Homology ===

2026-05-15T11:39:49Z

Transform

← Older revision		Revision as of 14:39, 15 May 2026
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	The latitude/longitude scale is not a linear measure. Thus, to a conversion to metric scale is better. UTM projection (pyproj) or using a local tangent plane.		The latitude/longitude scale is not a linear measure. Thus, to a conversion to metric scale is better. UTM projection (pyproj) or using a local tangent plane. The UTM projection works better for this 10-20 km distances.

			=== UTM projection ===



	=== Homology ===		=== Homology ===

2026-05-15T11:26:34Z

Transform

← Older revision		Revision as of 14:26, 15 May 2026
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	The latitude/longitude scale is not a linear measure. Thus, to a conversion to metric scale is better. UTM projection (pyproj) or ~~Local~~ tangent plane		The latitude/longitude scale is not a linear measure. Thus, to a conversion to metric scale is better. UTM projection (pyproj) or using a local tangent plane.

	=== Homology ===		=== Homology ===

2026-05-15T11:26:21Z

Homology

← Older revision		Revision as of 14:26, 15 May 2026
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	Some ideas to generate the transformation. Full camera projection is not needed here.		Some ideas to generate the transformation. Full camera projection is not needed here.


			The latitude/longitude scale is not a linear measure. Thus, to a conversion to metric scale is better. UTM projection (pyproj) or Local tangent plane

	=== Homology ===		=== Homology ===