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UER Forum > US: Pacific Southwest > anyone using GIS shapefiles for storm drain maps? (Viewed 1935 times)
RCP72 


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anyone using GIS shapefiles for storm drain maps?
< on 7/15/2015 7:29 AM >
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Posted on Forum: UER Forum
general question: does anyone have any useful utilities for analyzing storm drain maps? there are shapefiles available online for LA and san diego storm drains (pm me and i'll give more info) which can be overlayed on google earth - extremely useful! but the lines don't show any difference between 18" pipes and massive tunnels unless you click on them.

what i'd like to do is split the maps up into 3 groups - walkable tunnels, crawlable tunnels, and too-damn-small-to-care tunnels. also, i'd like to group the networks into separate connected trees. i can do this myself by exporting as KML files and manipulating the xml text, but if there's already tools out there that would be nice.

also, if other people are using these files, let me know what sorts of tools would be useful. i might just have to write them myself when i find the time.




Bikeski 


Location: Los Angeles, California
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Biking Warrior

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Re: anyone using GIS shapefiles for storm drain maps?
< Reply # 1 on 7/15/2015 7:46 PM >
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Posted on Forum: UER Forum
Posted by RCP72
what i'd like to do is split the maps up into 3 groups - walkable tunnels, crawlable tunnels, and too-damn-small-to-care tunnels. also, i'd like to group the networks into separate connected trees. i can do this myself by exporting as KML files and manipulating the xml text, but if there's already tools out there that would be nice.


Hey,

Download qgis and open your shape file with it. Filter data based on the tunnel diameter. Select small portions of the map at a time, Then save selections as kml. Voila.




Abby Normal 


Location: Las Vegas
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Re: anyone using GIS shapefiles for storm drain maps?
< Reply # 2 on 7/16/2015 2:50 AM >
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In the same vein (that's a mining joke...), I've just finished writing a little python script that will read in a data file from USGS of mines in the western states and create a KML file for Google Earth. The USGS site will create a KML file but I wanted waypoints for gold mines and gem mines color coded differently than the other mines. I also added a "pop up" that shows the minerals that were mined and a couple of other pieces of information that I like to see. Next I'm going to write a similar program to output a GPX so I can input it into a GPS for when I head out into the desert.

The point being that a scripting language like Python can make life a lot easier when trying to manipulate large data files.

Abby Normal




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Bikeski 


Location: Los Angeles, California
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Re: anyone using GIS shapefiles for storm drain maps?
< Reply # 3 on 7/16/2015 7:45 PM >
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Posted by Abby Normal
In the same vein (that's a mining joke...), I've just finished writing a little python script that will read in a data file from USGS of mines in the western states and create a KML file for Google Earth. The USGS site will create a KML file but I wanted waypoints for gold mines and gem mines color coded differently than the other mines. I also added a "pop up" that shows the minerals that were mined and a couple of other pieces of information that I like to see. Next I'm going to write a similar program to output a GPX so I can input it into a GPS for when I head out into the desert.

The point being that a scripting language like Python can make life a lot easier when trying to manipulate large data files.

Abby Normal


I've heard the mine coordinates in the usgs files are all off. Good luck with that.




Abby Normal 


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Re: anyone using GIS shapefiles for storm drain maps?
< Reply # 4 on 7/16/2015 9:27 PM >
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Posted by Bikeski


I've heard the mine coordinates in the usgs files are all off. Good luck with that.


Actually I had pretty good luck with it.

The data isn't as bad as you heard. After importing my KML file into Google Earth, the majority of mines that I looked at are within 50 feet of the data coordinate. I can live with that. It is obvious that there were two separate sources imported into the USGS database resulting in many of the mines being duplicated. One source has more complete information than the other. If I get motivated I'll write a bit of code to identify and eliminate the dups. The data also contains prospects as well as producers, so many of the prospects have been obliterated over time leaving no trace of them. That would certainly make it appear as if many of the data point is off. We've also found quite a few mines that aren't in the database at all. With over 55,000 sites in just the Nevada file dating back to the mid 1800s, it's inevitable that some percentage of the data is going to be bad.

Since I'm using it to research potential mine sites to explore before I head out into an unfamiliar area, it's the best research resource that I've come across so far.

Abby Normal





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azuro1125 


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Re: anyone using GIS shapefiles for storm drain maps?
< Reply # 5 on 7/21/2015 12:15 AM >
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Too cool! You guys are my hero.




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Evilbunny 


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Re: anyone using GIS shapefiles for storm drain maps?
< Reply # 6 on 7/23/2015 6:04 AM >
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I believe I still have the files from oakland one of the people on here got but i never figured out how to lay it onto maps




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Abby Normal 


Location: Las Vegas
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Re: anyone using GIS shapefiles for storm drain maps?
< Reply # 7 on 7/23/2015 1:33 PM >
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Posted by Evilbunny
I believe I still have the files from oakland one of the people on here got but i never figured out how to lay it onto maps


As long as the file has at least latitude and longitude it can be turned into a Google Earth file or a GPX file that can be imported into most GPS devices. Location names are useful of course, but not absolutely necessary.

Shoot me a PM if you would like me to create those files for you. It may take a couple of days since my program is programmed specifically for the mine database. I can code up a script that will read your file and output the other two.

Abby Normal



[last edit 7/23/2015 1:41 PM by Abby Normal - edited 1 times]

"Government is not a solution to our problem, government is the problem." Ronald Reagan
UER Forum > US: Pacific Southwest > anyone using GIS shapefiles for storm drain maps? (Viewed 1935 times)


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