<p>Attached is an image of the Avra valley in Southern Arizona, USA from</p>

<p><a href="https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/WR018i004p01215" rel="nofollow noreferrer">Effects of Kriging and Inverse Modelling on Conditional Simulation of the Avra Valley Aquifier in Southern Arizona -- Clifton and Neuman</a></p>

<p>Two related questions</p>

<ol>
<li>What is this <code>R{int}E-T{int}S</code> coordinate system? Is it US specific? Arizona specific? A reference and how to convert to a global system would be great.</li>
<li>Is there somewhere where I can find a shape file for the designated region? I'm assuming this particular example has been used in several studies.</li>
</ol>

<p>Thanks!</p>

<p><a href="https://i.sstatic.net/l8RoF.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/l8RoF.png" alt="enter image description here"></a></p>

CC BY-SA 4.0
2019-09-20T11:42:17.413Z
it is the position,if you google T12S R11E you will find maps of the area.
trond hansen
CC BY-SA 4.0
2019-09-20T13:46:08.120Z
Questions for data are more suited for OpenData.SE, questions for coordinate systems are slightly more suited for GIS.SE. Two questions in one is not suited for SE in general.
Erik
CC BY-SA 4.0
2019-09-21T00:03:39.537Z
T = township, R = range. Part of the PLSS, public land survey system.
mkennedy
CC BY-SA 4.0
2019-09-21T17:49:08.037Z
Thank you both. @Erik get over yourself buddy, everyone else have a good day
Nadiels
CC BY-SA 4.0
2019-09-22T14:22:49.987Z
@Nadiels Dude, I pointed you some places you might find more extensive help and you bitch at me? Really?
Erik
<hydrology><reference-request>
Avra valley aquifier region boundary
Nadiels
# Avra valley aquifier region boundary

(Asked by: username_0 on 2019-09-20)

Attached is an image of the Avra valley in Southern Arizona, USA from

[Effects of Kriging and Inverse Modelling on Conditional Simulation of the Avra Valley Aquifier in Southern Arizona -- Clifton and Neuman](https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/WR018i004p01215)

Two related questions

1. What is this `R{int}E-T{int}S` coordinate system? Is it US specific? Arizona specific? A reference and how to convert to a global system would be great.
2. Is there somewhere where I can find a shape file for the designated region? I'm assuming this particular example has been used in several studies.

Thanks!

[![enter image description here](https://i.sstatic.net/l8RoF.png)](https://i.sstatic.net/l8RoF.png)

**Tags:** hydrology, reference-request

> **Comments:**
> **username_1**: it is the position,if you google T12S R11E you will find maps of the area.  
> **username_2**: Questions for data are more suited for OpenData.SE, questions for coordinate systems are slightly more suited for GIS.SE. Two questions in one is not suited for SE in general.  
> **username_3**: T = township, R = range. Part of the PLSS, public land survey system.  
> **username_0**: Thank you both. @username_2 get over yourself buddy, everyone else have a good day  
> **username_2**: @username_0 Dude, I pointed you some places you might find more extensive help and you bitch at me? Really?  

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## 0 answers

