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--- arma3:terrain:road-shapefiles-real-world-data [2017/04/24 14:09] – added new guide for roads deletion. snakeman
+++ arma3:terrain:road-shapefiles-real-world-data [2024/08/02 19:07] (current) – links added. snakeman
@@ Line 1: / Line 1: @@
-====== Road Shapefiles from Real World Data ======
+====== ArmA 3 Road Shapefiles from Real World Data ======
+[[https://www.pmctactical.org/forum/viewforum.php?f=68|ArmA 3 Forum]], [[:arma3|ArmA 3]], [[arma3:config|ArmA 3 Config]], [[arma3:missions|ArmA 3 Missions]], [[arma3:modeling|ArmA 3 3D Modeling]], [[arma3:scripting|ArmA 3 Scripting]], [[arma3:terrain|ArmA 3 Terrain]], [[arma3:texturing|ArmA 3 Texturing]], [[arma3:tools|ArmA 3 Tools]]
 **How to use real world data road shapefiles from OpenStreetMap (OSM) in ArmA 3**.
@@ Line 59: / Line 61: @@
   - select transformed layer, RMB -> zoom to layer, now you see roads aligning perfectly with your heightmap, congrats!
   - transformed layer RMB -> save as -> browse, this is your final road shape file name to be used in terrain builder, click ok
+**Global Mapper ID / ORDER**
+  - Fix shapefile attributes for ID and ORDER with [[arma3:terrain:road-shapefiles-real-world-data#id_and_order]] tutorial.
 All done! :-)
 Enjoy your real world data openstreetmap roads in terrain builder :-)
-{{ http://pmc.editing.wiki/images/Terrain-Builder-Global-Mapper-QGIS-Shapefile-Roads.png }}
+{{ https://pmc.editing.wiki/images/Terrain-Builder-Global-Mapper-QGIS-Shapefile-Roads.png }}
@@ Line 95: / Line 102: @@
 ====== Remove "Bad" Roads ======
-ArmA 3 crashes if you have more than roughly 9000 roads / features in the roads.shp shapefile. This is not precise number as it also depends on your other terrain properties, highest we have had in-game is 9,198 and lowest that caused crash was 8,665 so its not exact science. This is only issue for those large terrains or well, terrains that have large number of roads in the shapefile.
+ArmA 3 crashes if you have more than roughly 9000 roads / features in the roads.shp shapefile. This is not precise number as it also depends on your other terrain properties, highest we have had in-game is 9,198 and lowest that caused crash was 4,941 so its not exact science. This is only issue for those large terrains or well, terrains that have large number of roads in the shapefile.
+Note: for example plain deserts (heightmap) of iraq easily allows OSM road features of 9000 but the rugged mountains (heightmap) of afghanistan crashes for less then 5000. So use your own judgement with all these gazillion variables when you track down the amount of roads your terrain can handle.
+Mexico juarez 81km terrain had 7469 road features which caused virtual blocks crash. After global mapper 6m combine 4056 it still crashed. Finally after I cleanly reduced the features by deleting FCLASS roads to number I didn't write down (damn) and then 6m combine down to 1139 the crash was avoided.
 OSM shapefiles come with all kinds of backyard "path" roads etc, you might want if not have to remove some of these.
@@ Line 127: / Line 138: @@
 Delete these roads as they are mostly too excessive for arma3 terrains:
 <code>
-- bridleway
+bridleway
-- steps
+steps
-- foot*
+foot*
-- cycle*
+cycle*
-- path
+path
-- pedestrian
+pedestrian
-- track_grade*
+track_grade*
-- *link*
+*link*
-- living_street
+living_street
-- service
+service
-- unknown
+unknown
-- unclassified
+unclassified
-- residential
+residential
-- tertiary
+tertiary
-- track
+track
-- secondary
+secondary
 </code>
 track* takes too many roads from ukraine luhansk, from 17k to 380 heh.
@@ Line 154: / Line 165: @@
 List of important features for arma3 gameplay:
 <code>
-- motorway
+motorway
-- trunk
+trunk
-- primary
+primary
 </code>
@@ Line 162: / Line 173: @@
 ====== Simplify Road Shapefiles ======
-Most likely your OSM downloaded road shapefiles are too complex for terrain builder / arma3, so you need to simplify them. Meaning there are way too many vertices in the polylines which can be reduced.
+**Simplify Road Polylines**
+Most likely your OSM downloaded road shapefiles are too complex for terrain builder, so you //might// need to simplify them. Meaning there are way too many vertices in the polylines which can be reduced. **Note 2018-03-02 update:** arma3 loads any OSM poly line shape file just fine, there is no need to simplify for arma3's sake, PMC has done hundred terrains with various size and quality OSM road poly lines and all of them have been working great.
 If you import too complex or "large" road shapefiles to terrain builder it will start to stutter and freezes up.
@@ Line 169: / Line 182: @@
 From enter simplification threshold dialog, use horizontal threshold 10 and vertical threshold elevation (meters) 0.2 for good results.
+====== Combine Road Features ======
+USA Los Angels 40km terrain openstreetmap.org road polylines even after "bad roads" reduction were over 17,000 features which is like ten thousand over the limit. They need to be reduced. Please note that this was some very odd issue on these specific OSM shapes because normal roads / streets were split up to hundreds of small features when it should have been one feature.
+I have not experienced such splitting up of polylines in other terrains in this scale.
+Select all roads -> RMB in the viewport -> crop/combine/split functions -> combine. Then use about 6 meter value, should work fine (we used also 20m but that might be too large). In select combine options menu let it be default (combine any overlapping and everything else ticked).
@@ Line 216: / Line 238: @@
 [[http://www.mapcruzin.com/free-world-country-arcgis-maps-shapefiles.htm|mapcruzin.com]]\\
 [[http://extract.bbbike.org/|extract.bbbike.org]]