albersusa | Tools , shapefiles & data to work with an AlbersUSA | Map library
kandi X-RAY | albersusa Summary
kandi X-RAY | albersusa Summary
Creating a composite projection for states and counties of the United States that includes scaled and shifted polygons for Alaska and Hawaii is time consuming and potentially error-prone. Functions and data sets are provided to make it easier to produce maps with a composite projection. Furthermore, named projections for common transormations are provided to further increase mapping productivity.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of albersusa
albersusa Key Features
albersusa Examples and Code Snippets
Community Discussions
Trending Discussions on albersusa
QUESTION
I am attempting to create a map option within a data dashboard, where the map will always be of the state of Texas. For that reason, I don't want to give the user the ability to change the scale or recenter the map, because it's more likely to create confusion than contribute anything beneficial. However nearly all of the Vega documentation examples revolve around maps with that functionality.
I do, however, need the view to change based on the user's screen size and changes to the dashboard window. For that reason I've been trying to use Vega's "fit" and "size" properties, rather than explicitly defining a center and scale. At this point I've gotten the map working, with the legend where it needs to be, colors are all right, etc., but I can't figure out how to get the window to resize on anything other than the full projection. Because I'm working with only a single state, albersUSA is the closest I can get but it's still far too wide of a view.
Based on the documentation, I understand "fit" works on geojson data and I've tried using the original map data, and I even went ahead and just created a version with a square the approximate size of Texas, so I could place the coordinates directly into the javascript, but nothing has worked.
Does anyone have any idea on how to get this working?
...ANSWER
Answered 2022-Mar-30 at 20:46In your example try this for Vega projections:
QUESTION
I have data for a few states in the US and others are Null. While creating the maps, I would like to shade in the states with the missing value in the text but I am struggling to find the correct method. With my current code, I am unable to get the entire US map including the states with the Null value, and only the states with a certain assigned value pop up. I have also looked at previous questions posted and tried layering the maps but that gives me an error. here's how cc_df looks like
Here's my code:
...ANSWER
Answered 2022-Jan-04 at 04:25I was aware that the points you pointed out were issues, so I did some research against NaN values and found the following answers. However, the conditional judgment of the null value did not work, so I replaced the missing value with -1 to get the desired output.
QUESTION
I need to plot the rivers in idaho from this website
When I load it into geopandas and try to plot it through altair.Chart().mark_geoshape() my graph comes up with a bunch of random lines and they aren't plotting as expected. I don't know what is going on because I am new when it comes to geospatial data.
I followed the pattern from this example https://altair-viz.github.io/gallery/london_tube.html but I wasn't able to plot the lines.
Any thoughts or how I can do this would be of great help! Below is the code I am using. Thank you!
...ANSWER
Answered 2021-Dec-01 at 07:22The reason it was not drawn was that the geopandas data coordinate system was different, so it needed to be converted to a format that represented latitude and longitude. My experience with this kind of thing is limited, so I had to figure it out by hand. I actually referenced a map of Idaho to make sure it matched.
QUESTION
I would like to add bar charts to a map in ggplot2. Similar questions exist (this one and this one) but their answers involve ggsubplot, which is deprecated.
geom_scatterpie()
provides a way to do this with pie charts (example 1 but also see example 2), but pie charts are not as visually intuitive as bar charts. Similarly, we can plot bubble size onto a map using geom_sf(size=)
as explained here. So is there a way to do this with bars instead?
Reproducible example for making one bar per location:
...ANSWER
Answered 2021-Sep-07 at 07:38Adding bars as points sounds a bit awkward to me. If you want to add bars to your map one option would be to make use of geom_rect
like so:
QUESTION
I am trying to add pop_april_2010 values associated with each County to the map. However my code only returns the base map when I don't include the line "color='pop_april_2010:Q'". Including the line results in an empty image without the map.
Dataframe - df
The data is from Kaggle > https://www.kaggle.com/camnugent/california-housing-feature-engineering?select=cal_populations_county.csv
Code
...ANSWER
Answered 2021-Apr-28 at 01:45The reason the chart is empty when using color
is that the wrong column name is used in the lookup of the topojson file, so nothing is returned and you are passing a string referencing a non-existing column to color
. If you inspect your topojson file you can see that each county's named is stored in the NAME
attribute, not County
.
Further, if you compare your topojson to what is in the vega sample data (for easier comparison paste them into a json viewer) you can see that the key used in the sample data file for the lookup example (id
) is at the top level of each geometry
object while in your fie it is nested one more level under properties
. This means that you need to use 'properties.NAME'
as the lookup string (more details about working geogrphical data in this answer):
QUESTION
I am working on a Choropleth map that will display the similarities between different states. So when you select a state from a dropdown, the map will show the similarity it has to other states.
For this, I am using 2 datasets:
- DatasetA: a long-form dataframe, with 3 columns: State 1, State 2, and the similarity between them.
- DatasetB: a GeoDataFrame that contains the geometry of each state.
When I try to plot this without the selection, then it works:
...ANSWER
Answered 2021-Apr-08 at 20:24I got this to work by using a transform_fold. The problem is that the transform_lookup only matches once, so if there are multiple matches in the dataset, it ignores them. So you have to use a wide-form dataset and then use the transform_fold
to convert it back into long-form.
QUESTION
I'm looking to crop the density plot to only land while keeping to sf
.
Here's a simple example problem:
...ANSWER
Answered 2021-Apr-02 at 16:34Create a rectangle of the same plot dimensions:
QUESTION
I'm looking to create a masking polygon for multiple polygons.
It's easy enough for a single polygon:
How to apply a polygon mask layer in ggplot
but much trickier for multiple:
https://www.stat.auckland.ac.nz/~paul/Reports/GraphicsEngine/definitions/definitions.html
I feel like I'm fairly close but I need a method of drawing a line between a point for the closest polygon, i.e. I'd like to try and connect nearest islands with a line.
While also connecting those polygons to an outer polygon box but only with a single line:
...ANSWER
Answered 2021-Apr-04 at 20:59Edit: For only a mask around the islands:
QUESTION
I am using Angular
based Storybook
. All I wanted to do is to re-render the chart based on the values given in the Storybook's control. But the Chart remains static even after changing the value of the control. I tried so many workarounds, but still am at square one. The chart I wanted to display is a choropleth. I have used Chartjs
and chartjs-chart-geo
library to display the chart.
My component in Storybook :
...ANSWER
Answered 2021-Mar-25 at 15:12The getGeoData
method which sets up the chart is called only during component initialization and it wont run when @Input
values change. For these scenarios Angular provides ngOnChanges
lifecycle hook. And this is where we need to tell Angular what needs to be done when @Input
values change.
QUESTION
Based on the stack trace, I can see that Altair only accepts the following projections -
...ANSWER
Answered 2021-Feb-16 at 16:27Altair follows the Vega-Lite schema.
Vega-Lite lists supported projections in the ProjectionType
definition; according to this, the allowed projection types are the following:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install albersusa
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page