OSM rivers to one main branch Python - Revision history

Mol: /* 3. Fix the gaps (Make a graph) */

2026-04-28T16:25:32Z

3. Fix the gaps (Make a graph)

← Older revision		Revision as of 19:25, 28 April 2026
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	== 3. Fix the gaps (Make a graph) ==		== 3. Fix the gaps (Make a graph) ==

	Kemijoki_mainbranch.parquet		Kemijoki_mainbranch.parquet. 4e_combinedByHand.py

	<syntaxhighlight lang="Python">		<syntaxhighlight lang="Python">

2026-04-28T16:24:14Z

3. Fix the gaps (Make a graph)

← Older revision		Revision as of 19:24, 28 April 2026
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	== 3. Fix the gaps (Make a graph) ==		== 3. Fix the gaps (Make a graph) ==

			Kemijoki_mainbranch.parquet

	<syntaxhighlight lang="Python">		<syntaxhighlight lang="Python">

2026-04-28T09:19:04Z

2. Plot Kemijoki and tributaries

← Older revision		Revision as of 12:19, 28 April 2026
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	plt.show()		plt.show()
	</syntaxhighlight >		</syntaxhighlight >

			This is easy to edit to show all rivers. However, there are many rivers sharing the same name.

	== 3. Fix the gaps (Make a graph) ==		== 3. Fix the gaps (Make a graph) ==

2026-04-28T09:03:20Z

3. Plot and check

← Older revision		Revision as of 12:03, 28 April 2026
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	</syntaxhighlight >		</syntaxhighlight >

	== 3. ~~Plot and check~~ ==		== 3. Fix the gaps (Make a graph) ==


	<syntaxhighlight lang="Python">		<syntaxhighlight lang="Python">
	</syntaxhighlight >		</syntaxhighlight >

2026-04-28T08:21:23Z

2. Plot Kemijoki and tributaries

← Older revision		Revision as of 11:21, 28 April 2026
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	Kemijoki 2b maingeometryUnaryUnion.png\|The unary union of the main geometry		Kemijoki 2b maingeometryUnaryUnion.png\|The unary union of the main geometry
	Kemijoki 2b maingeometryUnaryUnionConnected.png\|Connected, intersections		Kemijoki 2b maingeometryUnaryUnionConnected.png\|Connected, intersections
	<gallery>		Kemijoki 2b touching1.png\|Touching 1. Buffer 80 km.
			Kemijoki 2b touching2.png\|Touching 2. Buffer 80 km.
			Kemijoki 2b touching3.png\|Touching 3. Buffer 80 km.
			Kemijoki 2b touching4.png\|Touching 4. Buffer 80 km.
			Kemijoki 2b touching5.png\|Touching 5. Buffer 80 km.
			Kemijoki 2b touching10.png\|Touching 10. Buffer 80 km.
			Kemijoki 2b touching20.png\|Touching 10. Buffer 80 km.
			</gallery>

2026-04-28T08:16:13Z

2. Plot Kemijoki and tributaries

← Older revision		Revision as of 11:16, 28 April 2026
Line 164:		Line 164:

	== 2. Plot Kemijoki and tributaries ==		== 2. Plot Kemijoki and tributaries ==

			<gallery>
			Kemijoki 2b border1.png\|The effect of buffer
			Kemijoki 2b buffer2.png\|Larger buffer
			Kemijoki 2b clipped10.png\|Clipped with 10 km buffer
			Kemijoki 2b clipped20.png\|Clipped with 20 km buffer
			Kemijoki 2b clipped40.png\|Clipped with 40 km buffer
			Kemijoki 2b clipped80.png\|Clipped with 80 km buffer
			Kemijoki 2b maingeometryUnaryUnion.png\|The unary union of the main geometry
			Kemijoki 2b maingeometryUnaryUnionConnected.png\|Connected, intersections
			<gallery>


	The beginning (loading the river data files and converting) is the same as before.		The beginning (loading the river data files and converting) is the same as before.

2026-04-27T19:00:40Z

2. Plot Kemijoki and tributaries

← Older revision		Revision as of 22:00, 27 April 2026
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	# Plot it		# Plot it
	fig, ax = plt.subplots(figsize=(6, 10))		fig, ax = plt.subplots(figsize=(6, 10))
	~~ax = finland.plot(color="#f0f0f0", edgecolor="gray")~~

			finland.plot(ax=ax, color="#f0f0f0", edgecolor="gray")
	final_rivers.plot(ax=ax, color="blue", linewidth=0.4)		final_rivers.plot(ax=ax, color="blue", linewidth=0.4)
	kemijoki.plot(ax=ax, color="darkblue", linewidth=1.5)		kemijoki.plot(ax=ax, color="darkblue", linewidth=1.5)

2026-04-27T17:09:46Z

← Older revision		Revision as of 20:09, 27 April 2026
Line 19:		Line 19:
	The analysis of different coordinate systems is shown elsewhere.		The analysis of different coordinate systems is shown elsewhere.

	=== 1 ===		=== Plot all Waterways ===

	<syntaxhighlight lang="Python">		<syntaxhighlight lang="Python">

2026-04-27T17:07:35Z

The shp datafile

← Older revision		Revision as of 20:07, 27 April 2026
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	[11 rows x 6 columns]		[11 rows x 6 columns]
			</syntaxhighlight>

			<syntaxhighlight lang="python>
			gdf['name'].dropna().head(20)
			0 Ruoholahdenkanava
			1 Porvoonjoki
			2 Kyrönjoki
			3 Kyrönjoki
			4 Raisionjoki
			5 Riipinluoma
			6 Tjäck Ã¥
			7 Kyrönjoki
			8 Kyrönjoki
			9 Kyro Älv
			10 Jalasjoki
			11 Kupparinoja
			12 Harjunjoki
			13 Jyräänjoki
			15 Hirvenjoki
			16 Takajoki
			18 Juotjoki
			21 Luhtaanmäenjoki
			22 Kostianvirta
			23 Ahlaistenjoki
			Name: name, dtype: object

	</syntaxhighlight>		</syntaxhighlight>

2026-04-27T17:06:09Z

The shp datafile

← Older revision		Revision as of 20:06, 27 April 2026
Line 89:		Line 89:
	</syntaxhighlight>		</syntaxhighlight>

			<syntaxhighlight lang="python>
			print( river( ['fclass'].value_counts() )
			fclass
			stream 104937
			river 12776
			drain 9186
			canal 604
			Name: count, dtype: int64
			</syntaxhighlight>

← Older revision		Revision as of 11:21, 28 April 2026
Line 174:		Line 174:
	Kemijoki 2b maingeometryUnaryUnion.png\|The unary union of the main geometry		Kemijoki 2b maingeometryUnaryUnion.png\|The unary union of the main geometry
	Kemijoki 2b maingeometryUnaryUnionConnected.png\|Connected, intersections		Kemijoki 2b maingeometryUnaryUnionConnected.png\|Connected, intersections
	<gallery>		Kemijoki 2b touching1.png\|Touching 1. Buffer 80 km.
			Kemijoki 2b touching2.png\|Touching 2. Buffer 80 km.
			Kemijoki 2b touching3.png\|Touching 3. Buffer 80 km.
			Kemijoki 2b touching4.png\|Touching 4. Buffer 80 km.
			Kemijoki 2b touching5.png\|Touching 5. Buffer 80 km.
			Kemijoki 2b touching10.png\|Touching 10. Buffer 80 km.
			Kemijoki 2b touching20.png\|Touching 10. Buffer 80 km.
			</gallery>