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-   -   Mapping a disc golf course - Zephyr Cove (https://www.dgcoursereview.com/forums/showthread.php?t=90789)

pineappaloupe 06-21-2013 02:45 AM

Mapping a disc golf course - Zephyr Cove
 
I am a GIS geek who also plays disc golf.
I ran into some of the guys who started the Zephyr Cove DGC, started talking, and next thing I know I am volunteering to map the course.

I started off using google earth, but it was annoying because the aerial imagery shifts between years, I was having a hard time putting together a point file, and then having to draw the lines. I wanted to calculate elevation, and the underlying DEM on google earth is really bad for some parts of the course.

I maintain my own student license of ArcMap 10, and know about a LiDAR dataset that it freely available. I got a bit carried away. If you want me to go into detail of what I did just ask. In short: I used raw LiDAR data (19 million points in 500mb) in my sample area. Processed it into a terrain, created a DEM, DSM, and contour lines. Overlaid my GPS points (~3m accuracy, I need 1m but no one has volunteer a Trimble yet), drew the lines, and extracted elevation data from the DEM.

I know I need to make it printer friendly, and need some direction of what information to include, and I am not artistic at all so it needs some love.
Here is my first map, from about a week ago

http://i42.tinypic.com/4q4vt1.jpg

and one I did today, this time using UTMs so I could get the distances easier (the right way)
http://i43.tinypic.com/2lvbrbl.jpg


if anyone wants to see a pdf:
https://sites.google.com/site/dpdeeg...edirects=0&d=1

I plan on getting all of the data, including the base images, up on Google Earth. I have been having some trouble with producing the kmz all in one shot, but I think I figured out some different settings.
I know the LiDAR is complete overkill, but I always wanted to calculate vegetation heights.

My next steps are: better GPS points (1m), redoing the DEM/DSM so that I fill in null data and smooth it out so I don't get so much clutter in trees. And add pin positions. Once the base map is figured out adding new points/lines is really easy.
And then get hosting figured out for the kmz and pdf, so that I can just post a QR code at the course.

There are 3 other courses in the Tahoe Basin with LiDAR coverage, so if I can get someone to GPS the courses up north, I'll do all of the courses.


Look closely at the area West of the school, you can see goal posts. The DEM is that accurate.

rootofthechord 06-21-2013 03:05 AM

I'm the opposite of an art expert, and I only have limited experience with GIS, but:

holy smokes. This is fantastically rich. I am very impressed and excited.

pineappaloupe 06-21-2013 03:23 AM

Thanks. If anything I can make an accurate map image that someone can draw over. Or I can refine the vegetation layer. I might be able to greyscale it so that it could be printed, but I like the yellow circles for baskets.
Making something print friendly is difficult, which is why I need some help from someone with knowledge of that side of things.
Once I get the .kmz up on google earth, and working properly so that I can make all my changes in ArcMap, I will link to it here. Maybe have a second version that can be crown sourced? And put something at the course.

For anyone interested in what LiDAR data, you can view it all processed nicely in Google Earth here:
http://www.opentopography.org/index....n_google_earth
The more useful images are the 315/45 slopeshade. The base stuff is cool too because you can see tons of old roads, logging impacts, trails.

PS: I know that the hole 18 data got cut off. I must have accidentally resized that tables when I was removing the QR code and other stuff before I made the image.

I am thinking about making the whole map in meters, to try to convert some people to the metric system. Your discs are already weighted in grams.... might as well go all the way.

Again, if anyone can take accurate GPS data anywhere in Tahoe, and are interested in using the LiDAR base imagery for map making, let me know. I can probably make another one in an afternoon.

teemkey 06-21-2013 03:55 AM

Nice GIS work. I guess my suggestion is that it would be very helpful to include walking paths and/or other objects for the player to use for orientation to the next tee (while at ground level ;)).

pineappaloupe 06-21-2013 04:23 AM

Quote:

Originally Posted by teemkey (Post 2048272)
Nice GIS work. I guess my suggestion is that it would be very helpful to include walking paths and/or other objects for the player to use for orientation to the next tee (while at ground level ;)).

That is a great suggestion, especially because a lot of work has been done to build paths that guide people and prevent erosion. It wouldn't apply to every hole, but on hole 10 they are trying to guide people down a better path. Better signage at the tee pad would help more, but it should be included on the map.

Until I get better GPS points I am going to smooth that base image out, either in the DEM/DSM, or get it in photoshop as is and see if that is a better tool. I'll need to use that type of software anyway before it goes to print.

Kenny53691 06-21-2013 10:52 AM

Quote:

Originally Posted by teemkey (Post 2048272)
Nice GIS work. I guess my suggestion is that it would be very helpful to include walking paths and/or other objects for the player to use for orientation to the next tee (while at ground level ;)).

I've never though about this before, but I really like the idea.

ohtobediscing 06-21-2013 11:15 AM

I really like the height-of-groundcover on the first map.:thmbup:

knettles 06-21-2013 11:50 AM

It's a little thing, but I would suggest changing the lines of the flight path from blue to red. The blue blends in too easily with the green foilage. Afterall, that is the most important part of the map.

Royal Hill 06-21-2013 12:45 PM

Quote:

Originally Posted by pineappaloupe (Post 2048255)
Thanks. If anything I can make an accurate map image that someone can draw over.

This is actually a great concept. I've done this with the wilderness course map below. The course steward sent me a google earth data set with points and then I took it from there. So the layout is true to z axis (birdseye) but I worked up the surrounding theme elements on the 3/4 angle. Stars are pins.

It's a concept piece that really plays well for many users. Simple, fun, and engaging. Good for course related brochures that the public would see. Good poster wall hanger for those who love the course. Or could go on the back of a t shirt. A newcomer may see it, think - oh that looks fun, and with the aid of on course directional signage could handle it well. Its a 4x6 ratio, so it can be printed professionally as a "photo" at a photo center cheaply and with great color for handouts. (also a great cheap and easy way to print and distribute tourney maps for player packs at events with event course layouts)

Players wanting "player details" can have another map drawn up.
Good to have both. (and a blackline only version for cheap prints)

I sometimes think we overcook our maps for common use sometimes trying to please tourney style players and in the process alienate, confuse, or intimidate those wishing to simply play the course.

https://sphotos-b.xx.fbcdn.net/hphot...77237766_n.jpg

Kenny53691 06-21-2013 02:51 PM

I am in the beginning stages of a potential 9 hole course. The trouble that I'm running into is that it's hard to get a great map. I work for the local Auditor, but our aerial shots from early last year have a bad shadow from trees issue where I can't even hardly tell where the trees are. I've done some ground work, but I'd like to have a map that could help out a little more. Sadly, I going between the auditor's page and bing maps and trying to figure out stuff from there. Any other suggestions on where to check if the map is current and better?


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