4 ms·

Simulated Dendrochronology of US Immigration 1790-2016

71 points by adzm 8y ago

petermcneeley 8y ago
Are the Marshall Islands part of lower lower south Canada?
ggm 8y ago
Beautiful effect. So full marks for stylish and simple. I'm not sure I can read all the story-arcs of change over time on this un-adorned. I think the photo of a huge redwood trunk with significant events in the human timeline overlaid might be in my mind here: left could be legal changes affecting immigration, right could be world events stimulating immigration eg the boom and bust and famine cycle.
LiweiZ 8y ago
Do colors used have any meaning? When I look at it as part of a tree, green and calm colors for me always suggest healthy growth. I understand my question might be a bit political. I'm just getting this feeling when I perceive all the beautiful graphs as part of a tree. This probably would get many downvotes. But still I want to let you know my instant feelings.
- yjftsjthsd-h 8y ago
  Colors and side of the tree are points of origin; it's in the 3rd image on the page. If you're asking why those colors were picked... they have to be something; it's almost certainly random assignment of easily-distinguishable colors.
- helpfulWalrus 8y ago
  Yes: RED - Alert! Scary persons alarm! ORANGE - Safety barrier! Do not cross these persons! YELLOW - Caution! Dangerous people here! GREEN - Soothing and healthy, as the leaves of lettuce or spinach. BLUE - Calm and clear as the bluest sky. INDIGO - Bruised and injured. Damaged goods. VIOLET - Like an eggplant. Eggplant echoing a racist slur denoting skin color. I mean, isn't it all quite obvious? No need to read between the lines, friend.
mirimir 8y ago
I'm surprised that African slaves aren't an obvious component. Am I missing something? I am somewhat red-green color blind, I admit. But I did look at the left-hand list in the video, and didn't see many.
- dzdt 8y ago
  The US made slave importation illegal in 1808 -- [1] though see [2]. The slaves in the US between then and the civil war were mostly born here. There is also a data issue. The graphs are generated from US census information. The census first asked nation of origin for free persons starting in 1850. The only census asking nation of origin for slaves was 1860. [1] https://en.m.wikipedia.org/wiki/Act_Prohibiting_Importation_of_Slaves https://en.m.wikipedia.org/wiki/Act_Prohibiting_Importation_... [2] https://en.m.wikipedia.org/wiki/Clotilda_(slave_ship) https://en.m.wikipedia.org/wiki/Clotilda_(slave_ship)
  - mirimir 8y ago
    Even though this is about immigration, TFA does note: > Tree rings that are nearly circular indicate that population growth due to immigration was much less significant than that due to natural-born persons. And I missed that census data is the source. Because at 100% in Firefox, the relevant paragraph ends: > The data was queried from IPUMS-USA and consists of millions of samples of questionnaires from U.S. At 110%, I see that it's actually: > The data was queried from IPUMS-USA and consists of millions of samples of questionnaires from U.S. Censuses. So yeah, I guess that census data didn't include slaves.
TomMckenny 8y ago
I notice an unusually large spike in German immigration 1970-1990. Does anyone know why?
- safanycom 8y ago
  East Germany?
  - matt4077 8y ago
    That would have been after 1990 (well, November 1989). Remember the wall? I’d guess a change in visa rules, with possibly some pent-up demand.
NelsonMinar 8y ago
I'd love to know the details of how individual cells are placed. It's beautiful!
- NelsonMinar 8y ago
  Ah, they have a paper with detail: https://web.northeastern.edu/naturalizing-immigration-dataviz/download/portfolio-camera-ready.pdf https://web.northeastern.edu/naturalizing-immigration-datavi...
KineticLensman 8y ago
This is a real work of beauty. Also, I might have just found my side-project for the Christmas holiday: try to do something similar for the UK.
sct202 8y ago
I didn't realize there were such large waves of Canadian immigrants.

71 points by adzm 8y ago

Are the Marshall Islands part of lower lower south Canada?

ggm 8y ago

Beautiful effect. So full marks for stylish and simple. I'm not sure I can read all the story-arcs of change over time on this un-adorned. I think the photo of a huge redwood trunk with significant events in the human timeline overlaid might be in my mind here: left could be legal changes affecting immigration, right could be world events stimulating immigration eg the boom and bust and famine cycle.

LiweiZ 8y ago

Do colors used have any meaning? When I look at it as part of a tree, green and calm colors for me always suggest healthy growth. I understand my question might be a bit political. I'm just getting this feeling when I perceive all the beautiful graphs as part of a tree. This probably would get many downvotes. But still I want to let you know my instant feelings.

yjftsjthsd-h 8y ago
Colors and side of the tree are points of origin; it's in the 3rd image on the page. If you're asking why those colors were picked... they have to be something; it's almost certainly random assignment of easily-distinguishable colors.
helpfulWalrus 8y ago
Yes: RED - Alert! Scary persons alarm! ORANGE - Safety barrier! Do not cross these persons! YELLOW - Caution! Dangerous people here! GREEN - Soothing and healthy, as the leaves of lettuce or spinach. BLUE - Calm and clear as the bluest sky. INDIGO - Bruised and injured. Damaged goods. VIOLET - Like an eggplant. Eggplant echoing a racist slur denoting skin color. I mean, isn't it all quite obvious? No need to read between the lines, friend.

mirimir 8y ago

I'm surprised that African slaves aren't an obvious component. Am I missing something? I am somewhat red-green color blind, I admit. But I did look at the left-hand list in the video, and didn't see many.

dzdt 8y ago
The US made slave importation illegal in 1808 -- [1] though see [2]. The slaves in the US between then and the civil war were mostly born here. There is also a data issue. The graphs are generated from US census information. The census first asked nation of origin for free persons starting in 1850. The only census asking nation of origin for slaves was 1860. [1] https://en.m.wikipedia.org/wiki/Act_Prohibiting_Importation_of_Slaves https://en.m.wikipedia.org/wiki/Act_Prohibiting_Importation_... [2] https://en.m.wikipedia.org/wiki/Clotilda_(slave_ship) https://en.m.wikipedia.org/wiki/Clotilda_(slave_ship)
- mirimir 8y ago
  Even though this is about immigration, TFA does note: > Tree rings that are nearly circular indicate that population growth due to immigration was much less significant than that due to natural-born persons. And I missed that census data is the source. Because at 100% in Firefox, the relevant paragraph ends: > The data was queried from IPUMS-USA and consists of millions of samples of questionnaires from U.S. At 110%, I see that it's actually: > The data was queried from IPUMS-USA and consists of millions of samples of questionnaires from U.S. Censuses. So yeah, I guess that census data didn't include slaves.

TomMckenny 8y ago

I notice an unusually large spike in German immigration 1970-1990. Does anyone know why?

safanycom 8y ago
East Germany?
- matt4077 8y ago
  That would have been after 1990 (well, November 1989). Remember the wall? I’d guess a change in visa rules, with possibly some pent-up demand.

NelsonMinar 8y ago

I'd love to know the details of how individual cells are placed. It's beautiful!

NelsonMinar 8y ago
Ah, they have a paper with detail: https://web.northeastern.edu/naturalizing-immigration-dataviz/download/portfolio-camera-ready.pdf https://web.northeastern.edu/naturalizing-immigration-datavi...

KineticLensman 8y ago

This is a real work of beauty. Also, I might have just found my side-project for the Christmas holiday: try to do something similar for the UK.

sct202 8y ago

I didn't realize there were such large waves of Canadian immigrants.