Could you please help me to understand how can I create custom graphs (i.e. my own HTML+CSS) in Oracle BI?
I plan to design a dashboard and I need a very specific visualization (several interconnected circles segmented inside with fill % and color depending on different data sources) that is not available in stock graphs palette, and I can’t find any documentation on how to extend the palette.
It all depends on what technology you're aiming to you. Here's an example from ages ago about using D3js and calendar charts:
https://dimensionality.ch/2012/08/14/d3js-calendar-configuration-in-obiee-11g/
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I am a newbie in ODI. I have installed ODI 12c and created a data cube in it. After mapping the data cube, it is just added into the Oracle database like a simple table. I am wondering how the cube helps us to run queries very fast and in low time.
I have searched a lot and found that OLAP cube's Operations are Dicing, Drilling, Pivoting, ...
Would you please guide me on how to drill, dice, and pivot on the cube which is created in ODI?
Any help is really appreciated.
ODI it's a tool that integrates data. The operation of Dicing, Drilling, Pivoting and so on, are operations that are made on a reporting tool such as Oracle OLAP.
You can't do that in ODI.
You could see in this page all the details rearding ODI Cubes.
EDIT 1, based on comment:
Due to the fact that when you create a Cube, you need to specify a datastore and dimensions(and also when create a dimension you need to specify a datastore) it means that a Cube have a phisical table behind.
Please read here about dimensions and then about Cubes.
Very sort extraction from the links:
A cube is a set of measures grouped together that have similar dimensionality. The axes of the cube contain dimension values and the body of the cube contains measure values.
A dimension is a structure that organizes data. For example, a products dimension organizes data about products including product information, product categories and its sub-categories. A dimension consists of a set of levels and a set of hierarchies defined over these levels.
Hope that this answer helps you,
Florin!
I found that most of the examples of vega are illustrating creating charts which are with the x-axis, y-axis, title, and legends. There is even axis and scales defined in the specs. My question is:
Does vega support to create diagrams? such as UML editor?
In principle, I'd say yes - among the examples on the Vega website is a tree layout and a network layout. You could very likely adapt this to represent UML.
I am looking for a way to create a visualisation of live data (temp., humidity) from within a multi-story building overlaid on the floor plans. Each floor will likely be a projected iso view, laid over one-another.
I will most likely be using D3.js for the plotting, but am open to others.
I am currently considering two options:
using a 3D plot projection, and adding the floor plans as custom data.
creating custom TopoJSON files for each floor, and using a custom projection.
I am leaning toward the former.
Has anyone done any similar projects using purely indoor geospacial information? I can't seem to find any examples.
Any thoughts on which of the above two, and any other alternatives, will provide a more elegant or simple design?
I am new to d3 geo. My task is to make a map of Boston and add some interactive features to it.
So far I've been able to get an outline of Boston. But the base map should be comparable to something you'd see in Google Maps - it should have buildings, roads, street names and city names, rivers, etc. A basic geography that makes the region more familiar.
For now, I don't need to pan, and may have just two or three zoom states.
All the visualizations I've seen that overlay interactive features onto maps like this seem to use images for the underlying maps: windhistory, polymaps, google maps and more. So I guess my questions are:
Why do some maps use images for the "backdrop"? Is it just the easiest way to build on top of existing maps? Is it more performant?
If I go with the images approach, are there any limitations to the features I can add? I'm hoping to do things like windmaps, animations, heatmaps, etc.
What are the copyright implications for using images? I imagine the answer to this is, "depends on which images I use," but are there some standard libraries that have no strings attached? For example I know if I use Google Maps, I have to display their logo, there's an API limit, etc. Are there any standard sources that are completely open?
Are there any examples where geography is added purely through TopoJSON?
Sorry if some of these seem obvious, but I am completely new to maps and just don't know the standard practices. Thanks for any help!
A quick take on your questions. Hopefully someone with more mapping experience can give you more detail:
Why do some maps use images for the "backdrop"?
File size and computation time, mostly. Drawing complete maps with buildings, roads, and topography requires a lot of data and a lot of time for the browser to render it. If your browser DOM gets too complicated, it can slow down all interactions even after the original drawing.
If I go with the images approach, are there any limitations to the features I can add?
There's a reason most interactive maps use multiple layers. The background images are best for the underlying "lay of the land" type imagery, anything you want to be interactive should be on top with SVG.
What are the copyright implications for using images?
If you're using someone's images, you have to follow their licence. You might want to look at the OpenStreetMap project.
Are there any examples where geography is added purely through TopoJSON?
I suppose that depends on what you mean by "geography"; Mike Bostock has generated topoJSON for a variety of features based on US Atlas data.
As for whether it makes sense: TopoJSON encodes paths/boundaries directly, and encodes regions as the area enclosed by a set of boundaries. You could use it to encode streets and rivers and even building outlines, but you're not saving any file size relative regular GeoJSON because those paths generally aren't duplicated the way that region boundaries are. Relative to using image tiles, any improvement in file size would be countered with increased processing time.
I am trying to visualize a river flow- basically, should be able to visualize river current direction and speed based on an user-defined external parameter. This is required to demonstrate vectors in two dimensions- given education needs, animation quality can be minimal- 'tolerable enough'.
I tried a simplistic approach by a blue background with lines indicating currents- comes out very weak and below my low standards!!
Can someone point out a good example/ approach for achieving the same? Thanks.
You can create an image filter that looks like water. Look at Jerry's image filters. Specifically look at the the caustic filter. You could animate it moving from one end of the river to the other end. You can also experiment with varying the time parameter. Since it's open source, you can translate it to other languages.
Here are some links to 3d visualizations.