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I happened to be using the GeoMap? and the SingleScatterPlot? tools to
examine some correlations. It seems that a user can change the variables
selected in one tool without it affecting the other tool(s). It may be nice
to have an option for the user to be able to select variables in one tool
and have it automatically select the same ones in the other tools.

Tools like the starplots, the scatterplot, etc. need to be able to show
their data in scales other than the standard linear one. Log scaling would
be one option. 

Can't remember if I already posted this, but... When a user wants to
capture the screen image, the user has to move the mouse, which usually
causes an arbitrary unit (tract, county, whatever) to be selected and thus
displayed on the screen capture. Probably adding in key commands for the
save images toolbar would be best to work around this

In the maps, the star plots need to be scalable. Step one would be to have
them all the same size, but have that adjustable. Step two would be to tie
the size to a variable, and let the user set a min and max size. Perceptual
scaling, anyone?

What steps will reproduce the problem?
1. Start GeoViz Toolkit in MS Vista OS
2. Open the help from the top menu
3. Program freezes

Problem: Frank does not have access to a Vista system

Rob's comment:

Attached is an example of the "smart search box" I was describing.  It is
basically a drop down menu with an input text box rather than a button or
icon.  Each character you enter calls a function to research the array of
strings associated with the drop-down, eliminating ones that do not have a
character match.  This could possibly be a quick solution for next Friday
to allow for filtering of variables by attribute and date:

http://www.lakeshorepreserve.wisc.edu/imap/LakeshoreNaturePreserve.html


Frank's comment:

Yes, this should be fairly easy. Prefuse features such a component (using
the Lucene engine), so we can just nab that one. The thing that is better
about the "smart search box" that Rob showed us that is even nicer, is that
his searches for matches anywhere in the search terms, but the Lucene
implementations I have seen match from left to right only, so, for example,
typing "Bay Marsh" would match "University Bay Marsh" in Rob's tool but not
in Prefuse. But that can be fixed, of course!

The color swatches are a good idea. It may be useful to implement color
ramps, especially those that are "ColorBrewer?-approved."

There needs a way adjust color scheme in the matrixes. A short term
solution would be something that set color schemes globally for the
Toolkit(which would be nice to have anyway) but it needs to be in the GUI
somehow. 

For future work, I think it would be really helpful to allow users to scale
the starplots by a sum of multiple variables, or average of them perhaps.
For example, if I show fatalities for several time periods, it makes nice
little starplots that are ordered by time, and I pick out patterns there,
but then they often are not what they seem because each axis of the starplot
is being calculated relative to each particular variable. So for something
like fatalities it's a little difficult to understand because it might look
really high on one part of the starplot, but in actuality, the number of
fatalities is lower during that period than subsequent periods - it just so
happened that it was *relatively* high during that time period. Since there
are great reasons to use a starplot that always scales each axis
independently, it should be some sort of optional feature.

Alan writes:

is there any way for the user to control how fuzzy the background is for
unselected places (it is usually too fuzzy to see much now)?

Add some more projections and a GUI for the same. A few commonly used
projections would be fine. 

Would it be possible to allow the GeoMap? to display more than one
shapefile? If one is examining county-level data, it may be helpful to have
a shapefile of the state boundaries visible on top of the shapefile used
for ESDA.

When moving the sliders on the Custom Classifier to an "inverted" status
(low becomes high, and high becomes low), the upper and lower limits also
need to be inverted.

What steps will reproduce the problem?
1. Load spatial data set with > 500,000 coordinates 
2. Create more than 6 maps
3. Out of memory!

In comparing variables in the SingleScatterPlot?, I was occassionally
coming up with rSquare values of greater than 1.0. Is this possible?

It would be nice to have a moran explorer that has two histograms, one
scatterplot, two univariate maps, and one multivariate map, for exploring
spatial dependence.

If the Custom Classifier is exited, there is no way to pull it back up,
except to go to a different classification system and then reselect the
Custom Classifier. A more convenient way to pull it back up would be...more
convenient.

A zoom stack and GUI would be a Very Good Thing. This would go into the
GeoMap and friends, presumably.

Graduated symbols in maps need to be added. Starplot Maps should be looked
at  as a model. Proportional symbols as well?

A box plot component that could be plugged in anyplace. Ideally, it could
be a stand-alone component, and painted in where needed (a la star plots).

Create a graph type that creates small multiples, of maps or other data
views, with time on both axes. For example, year/month, or year/week, or
week/day. Map views and histograms would be good starter points. 

Additionally, it would be good if other variables could be added in, either
in a fixed way (comparing all against one particular variable) or in each
time slice. 

Anything with more than 100 shapes causes Moran Map to fail.

What steps will reproduce the problem?
1. Load a dataset with many identical values
2. Note how the classification does not keep observations with the same
value in the same class.

What steps will reproduce the problem?
1.
2.
3.

What is the expected output? What do you see instead?


Please use labels and text to provide additional information.
Provide ability to view metadata to describe variable names.

What is the difference b/n the Quantile & Raw Quantile classifications?

We need to parse prj files and do the right thing. Flex Projector and jhall
libs might help here.

The change to GeoTools shapefile libs broke the GeoMap Cartogram. Fix!

Add function to re-scale a variable dynamically. This would be based on two
variables, time frame and arrondissement for example. The variable created
would be a uniform scale, as in the PCP presently. 

Starplots don't do anything on selection-- this is wrong. 

What to do -- selection Starplot behavior? Need to discuss and decide. 

Provide an "Unload data" option

I don't think that typing in the values of the custom classifier works yet,
and this is on the newest version of GeoViz. For example, I can't enter
decimals. The only way to change the classification is to use the sliders,
but they are not giving me the numbers that I need.

What steps will reproduce the problem?
1. Start GeoViz Toolkit
2. Add PCAViz
3. Note factor names

Some boundaries are overlapping & hiding the stars on the StarPlot map.

I also think it would be awesome to incorporate wikipedia or something
similar to this particular application. I often encounter deaths in some
place that seem unusual to me, and I want to learn more about why so many
died in the 70's in Peru or whatever. It would be very neat if something
akin to the question output that Geojunction can provide (a simple sentence
that summarizes what the user has done recently - a time range, filtered
based on geography, about a particular subset of variables  - so "1970-1975,
Columbia and its neighbors, related to fatalities and attacks") could be
sent to wikipedia to see what it finds.

Perhaps you could provide a better form of "visibility of system status" as
described by Nielsen. When loading the data, perhaps the cursor should
change to an hourglass or other icon that indicates the system is
processing something.

Currently, swatches in the visual classifier and in the bivariate
visualization display color information. it would be better if they
displayed information about the classes, their boundaries, and counts, in
addition to the color information. 

When a data set larger than 100 shapes is loaded, the program appears to
freeze.

This will be fixed by moving to JTS.

Key commands should be added for Save Images so that the user can leave the
mouse on a tract that he wants displayed to others.

It may be beneficial to save/load a layout as well as the data contents and
any associated specifications (color scheme, classification, etc.).

Need to save:

1. Layout
2. Data
3. Symbolization and classification state

Trying to start the cartogram wizard application merely results in an error.

Clicking on the histogram creates the correct out-going selection. However,
the incoming selections are not displayed correctly.

I believe this problem to be fixed in the next release.

Both the data loading components and the various visualization and analysis
components need to be able to handle joining in additional data tables. An
example of what needs to work is joining in SaTScan clusters. 

What steps will reproduce the problem?
1. Start GeoViz Toolkit
2. Load county data set
3. Observe that Linkgraph only shows individual nodes

What is the expected output? What do you see instead?
We want to see lots of links and nodes, instead we see just occasional nodes

There needs to be a way to "invert" one variable on a bivariate color scheme

The code for MultiFrom Small Multiples is in the codebase, but it is not
exposed in the GeoViz Toolkit. I need to test it, add it to the GUI, and
add a marshal/unmarshal class for it. 

Alan writes:

did you know that clicking points in the scatterplot adds to the blue
selected elements in the histogram -- but that there is no way to deselect
a single point

This is related to the other selection issues.

In Alan's words:

the multi-select in the histogram is not Windows standard ... it seems that
CTRL click does not work and the SHIFT click works like CTRL click usually
does.

In fact, this is an issue for many of the components in the GeoViz Toolkit.
I will prioritize the map and histogram for now. 

This is a long standing issue, it must be fixed! 

The highlighting of the categories (white & blue shading of the relevant
color in the color ramp) does not work for Spartanburg county.  A possible
explanation may relate to its being the first county in the TableViewer--a
look-up issue of starting counting at 0 v starting counting at 1?

A leader line and icon change should indicate which bin is available for
selection in the histogram, and that the component can accept clicks for
selection change.