Create a Diagram from Database Information - ruby-on-rails

I've been trying to look around lots of libraries but wasnt able to find one that could help me, I already looked at diagramo and gojs and lots of canvas libraries that let you draw your diagram from the browser.
Im developing an application that creates a Cause and Effect Diagram from information that the users type, this information is saved on a database and I need to create a diagram like that from the database its something like this
http://www.fao.org/WAIRdocs/x5405s/x5405s0h.gif
Any good libraries you might know that could help me? Im using ROR as development

What's wrong with either of these?
I'm doing exactly this with GoJS and it's great - unfortunately the price of that library is high, though.

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Cemetery Mapping System using ArcGis

I'm currently working on my thesis, I need help on how to make a cemetery mapping system using arcgis, im not very familiar with gis but im willing to learn so i can pass. If you know any tutorials related to the topic or if you've done something like this in the past, feel free to help! thank you
Are you doing it from scratch? In ArcGIS you can upload shapefiles that you download from the internet. You can also create your own shapefiles.
I guess some tutorials like this might be helpful:
1) https://www.youtube.com/watch?v=pUnUrTzP2dw
2) https://www.youtube.com/watch?v=QrxWbZ5uHXQ
ArcGis is awesome, though a bit overwhelming at first. Have fun!

What is the starting point for simple image indexing for search tool

I'm bulding a small photo gallery website and I need a function that detect duplicate images (don't need to be be 100% accurate, just like Google Image Search).
I'm using a very new language (Golang) so I don't think there is any available library for this out there.
So what is the starting point for me? Please give me some keyword about this. Or if you have any material that is simple and easy to understand, please share me.
I think this blog post is simple and easy to understand.

Why would I need simplegeo?

I'm building a simple location-based service where users find out stuff near them based on their positions. I've heard a lot about simplegeo but can't seem to figure out where exactly I'll need their service. Their website doesn't seem to help too as far as product description is concerned. Can anyone enlighten me as to how the fit in?

Augmented Reality Help

I need a help to develop a small application on Augmented Reality.I have spend almost a week trying but with no proper solution.Tried some sample code but still not successful.
I have seen many videos and want to develop something like that.
for example my code should detect only square or any particular shape.And then after detecting the square and another Image should appear on the screen.
Please help me out.
This stuff is hard, but most new cool things are until they are no longer cool or new.
You can play with AR Toolkit until you are familiar with the functionality and then attempt to dive into the setting and mess with those, then maybe look at the source.

What web application framework should I use for a web gallery?

I need to create a photo gallery for a website running IIS 4.0 or IIS 5.0 (im not sure which). It needs to display a low resolution version of the gallery to anyone, and it must show both the low and high resolution images for "priviledged" users. So I need access priviledges, photo albums and once the site is complete, the person I am doing this for needs to be able to upload their own images to the gallery. It also needs to have a minimal interface as it needs to be integrated into an existing website.
So I need some advice on this with the direction I should approach it.
Does anyone know if their is a customisable gallery out there that can do something like this, such as Coppermine or Jgallery or something. The alternative is to use a web framework like Ruby on Rails, CodeIgniter or Sproutcore (each which require learning a new language). The framework would be more work, but the existing galleries may not be customisable enough. The important bit is the user privileges in an admin panel.
I am relatively new to "web programming", although not new to normal/games programming. I have a few years experience with C/C++ OpenGL and Java. I have also read up on MVC etc, and did hello world with sproutcore, so I kinda get the idea. Although learning a framework is a much heavier investment.
What are your thoughts?
If you don't want to re-invent the wheel you could use Gallery2 (requirements here). It runs on IIS -- you'd just need PHP and a database. It's very configurable (including user accounts), has lots of plugins, and its open source if that's not enough. Also, the development and support communities are large and active.
you could always go the route of Dotnetnuke and then use Ventrian's Simple Gallery module (http://www.ventrian.com/Products/Modules/SimpleGallery/Demo.aspx)
Using DNN offers a ton of functionality, including the security you need, and it would save you from doing any web development.
If you are a bit more adventurous, try Smaltalk based Aida/Web and specially Aida/Scribo CMS (currently still in beta), which include Gallery so called scriblet as well. Scribo scriblets are otherwise web components which you can include directly into a text. You therefore add a gallery directly into a surronding text. See for instance a presentation as a Gallery for example.
I would recommend my own but... If it weren't for the low/high resolution thing with permissions I think it would fit the rest of your needs. I'm going to leave a link just in case you want to take a look at it:
nzFotolog
It's also open-source (although the license is not the best) and you can change it at will if you want. The code itself is clean and self-explanatory. The downside is that I haven't developed it for some time now :(
Having faced a similar dilemma myself I have to say that I found Gallery2 and Coppermine both far too all-encompassing and difficult to customise to the degree I would have wished. I ended up rolling my own using straight, procedural PHP with various bits of jQuery for the GUI fancy bits. At the same time I was able to bake in some e-commerce and data gathering for my wedding photography clients, ending up with something which exactly matched my needs. Certainly, the gallery aspects of this project were, for a complete programming (although not HTML) neophyte, the least challenging - it's exactly the sort of thing PHP is made for.
I'm now taking my first faltering steps with CodeIgniter for my next project (photoblogging software) and I can already see that the framework would make a gallery project very quick, simple and secure.
Flickr.com and their API may be suitable from what you described.
http://www.flickr.com/services/api/

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