1 | DROP TABLE IF EXISTS map_bahn_g0; |
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2 | -- |
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3 | SELECT |
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4 | (ST_Dump(ST_LineMerge(ST_Collect(ST_SimplifyPreserveTopology(ax_bahnstrecke.wkb_geometry, 2.5))))).geom AS wkb_geometry, NULL::text AS widmung |
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5 | INTO map_bahn_g0 |
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6 | FROM ax_bahnstrecke; |
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7 | -- |
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8 | DROP SEQUENCE IF EXISTS map_bahn_g0_gid_seq; |
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9 | CREATE SEQUENCE map_bahn_g0_gid_seq; |
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10 | ALTER TABLE map_bahn_g0 ADD COLUMN gid INTEGER; |
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11 | UPDATE map_bahn_g0 SET gid = nextval('map_bahn_g0_gid_seq'); |
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12 | ALTER TABLE map_bahn_g0 ALTER COLUMN gid SET DEFAULT nextval('map_bahn_g0_gid_seq'); |
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13 | CREATE INDEX map_bahn_g0_gidx ON map_bahn_g0 USING GIST ( wkb_geometry ); |
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14 | CREATE INDEX map_bahn_g0_widmung_idx ON map_bahn_g0 (widmung); |
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15 | -- |
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16 | -- |
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17 | DROP TABLE IF EXISTS map_bahn_g1; |
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18 | -- |
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19 | |
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20 | SELECT ST_SimplifyPreserveTopology(wkb_geometry, 5) AS wkb_geometry, widmung |
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21 | INTO map_bahn_g1 |
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22 | FROM map_bahn_g0 |
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23 | WHERE ST_Length( wkb_geometry ) > 45; |
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24 | -- |
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25 | DROP SEQUENCE IF EXISTS map_bahn_g1_gid_seq; |
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26 | CREATE SEQUENCE map_bahn_g1_gid_seq; |
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27 | ALTER TABLE map_bahn_g1 ADD COLUMN gid INTEGER; |
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28 | UPDATE map_bahn_g1 SET gid = nextval('map_bahn_g1_gid_seq'); |
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29 | ALTER TABLE map_bahn_g1 ALTER COLUMN gid SET DEFAULT nextval('map_bahn_g1_gid_seq'); |
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30 | CREATE INDEX map_bahn_g1_gidx ON map_bahn_g1 USING GIST ( wkb_geometry ); |
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31 | CREATE INDEX map_bahn_g1_widmung_idx ON map_bahn_g1 (widmung); |
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32 | -- |
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33 | -- |
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34 | DROP TABLE IF EXISTS map_bahn_g2; |
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35 | -- |
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36 | SELECT ST_SimplifyPreserveTopology(wkb_geometry, 25) AS wkb_geometry, widmung |
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37 | INTO map_bahn_g2 |
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38 | FROM map_bahn_g1 |
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39 | WHERE ST_Length( wkb_geometry ) > 90; |
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40 | -- |
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41 | DROP SEQUENCE IF EXISTS map_bahn_g2_gid_seq; |
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42 | CREATE SEQUENCE map_bahn_g2_gid_seq; |
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43 | ALTER TABLE map_bahn_g2 ADD COLUMN gid INTEGER; |
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44 | UPDATE map_bahn_g2 SET gid = nextval('map_bahn_g2_gid_seq'); |
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45 | ALTER TABLE map_bahn_g2 ALTER COLUMN gid SET DEFAULT nextval('map_bahn_g2_gid_seq'); |
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46 | CREATE INDEX map_bahn_g2_gidx ON map_bahn_g2 USING GIST ( wkb_geometry ); |
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47 | CREATE INDEX map_bahn_g2_widmung_idx ON map_bahn_g2 (widmung); |
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48 | -- |
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49 | -- |
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50 | DROP TABLE IF EXISTS map_bahn_g3; |
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51 | -- |
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52 | SELECT ST_SimplifyPreserveTopology(wkb_geometry, 50) AS wkb_geometry, widmung |
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53 | INTO map_bahn_g3 |
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54 | FROM map_bahn_g2 |
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55 | WHERE ST_Length( wkb_geometry ) > 90; |
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56 | -- |
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57 | DROP SEQUENCE IF EXISTS map_bahn_g3_gid_seq; |
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58 | CREATE SEQUENCE map_bahn_g3_gid_seq; |
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59 | ALTER TABLE map_bahn_g3 ADD COLUMN gid INTEGER; |
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60 | UPDATE map_bahn_g3 SET gid = nextval('map_bahn_g3_gid_seq'); |
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61 | ALTER TABLE map_bahn_g3 ALTER COLUMN gid SET DEFAULT nextval('map_bahn_g3_gid_seq'); |
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62 | CREATE INDEX map_bahn_g3_gidx ON map_bahn_g3 USING GIST ( wkb_geometry ); |
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63 | CREATE INDEX map_bahn_g3_widmung_idx ON map_bahn_g3 (widmung); |
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64 | -- |
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65 | -- |
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66 | DROP TABLE IF EXISTS map_bahn_g4; |
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67 | -- |
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68 | SELECT ST_SimplifyPreserveTopology(wkb_geometry, 150) AS wkb_geometry, widmung |
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69 | INTO map_bahn_g4 |
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70 | FROM map_bahn_g3 |
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71 | WHERE ST_Length( wkb_geometry ) > 90; |
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72 | -- |
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73 | DROP SEQUENCE IF EXISTS map_bahn_g4_gid_seq; |
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74 | CREATE SEQUENCE map_bahn_g4_gid_seq; |
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75 | ALTER TABLE map_bahn_g4 ADD COLUMN gid INTEGER; |
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76 | UPDATE map_bahn_g4 SET gid = nextval('map_bahn_g4_gid_seq'); |
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77 | ALTER TABLE map_bahn_g4 ALTER COLUMN gid SET DEFAULT nextval('map_bahn_g4_gid_seq'); |
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78 | CREATE INDEX map_bahn_g4_gidx ON map_bahn_g4 USING GIST ( wkb_geometry ); |
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79 | CREATE INDEX map_bahn_g4_widmung_idx ON map_bahn_g4 (widmung); |
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