Thursday, February 7, 2013

Interactive Map of Freshwater Species

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"Freshwater Ecoregions of the World, (FEOW) provides a new global bio-geographic regionalization of the Earth's freshwater biodiversity.  Covering virtually all freshwater habitats on Earth, this first-ever ecoregion map, together with associated species data, is a useful tool for underpinning global and regional conservation planning efforts, particularly to identify outstanding and imperiled freshwater systems; for serving as a logical framework for large-scale conservation strategies; and for providing a global-scale knowledge base for increasing freshwater biogeographic literacy."


"Over a decade of work and contributions by more than 200 leading conservation scientists have produced a first-ever comprehensive map and database of the diversity of life in the world’s freshwater ecosystems. The map and associated fish data – a collaborative project between World Wildlife Fund and The Nature Conservancy." 

For the fish lovers, the map is so cool.  Since you all like fish....you might find it just as cool too!!!  It is interactive, click on an ecoregion, it shows threats, species etc.  User is able to change transparency on the image to show terrain behind the ecoregion.  


Oh yeah, there is a complete article that went along with it... 

Thursday, July 7, 2011

Cloud-based GIS application : ESRI Community Analyst

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Community Analyst includes demographic, health, economic, education, and business data variables to help users develop informed strategies for policy creation and critical resource allocation. Decisions such as matching health care clinics to areas with the greatest need or allocating infrastructure funding for maximum community impact can now be made and supported using customizable reports and maps more.

Sunday, June 12, 2011

Custom Google Maps Style

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From last couple of days I was busy on Google custom styling like http://maps-api-tt.appspot.com/apilite/styled/styled.html .

Fortunately, I found a good tutorial to share to carry out such custom styling. Check it out @bestfromgoogle  

Wednesday, May 25, 2011

Choropleth mapping techniques for Web2.0

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For my recent project, I have to display county wise time series data of disease pattern in web map for the conterminous United States for 20 years. In addition, I have to use Google maps as base layer and should overlay images on the top of it.  The concept sounds easy, and it was also similar with choropleth or thematic mapping. However, it should be in the Web 2.0.

I tried to figure out what are the possible ways to achieve this, I tried and few of them. Here I am going to share the pros and cons of these methods in a real quick and dirty style.

Choropleth with GFT
1) Google Fusion Tables

Pros:
Easy, No understanding of computer programming needed. Upload small or large data sets from spreadsheets or CSV files. Visualize your data on maps, timelines and charts. Pick who can access your data; hide parts of your data if needed. Merge data from multiple tables.

Cons:
Not much flexible and you can’t tweaks easily according to your needs. 

Choropleth with Cartographer.JS and Google API
2) Cartographer.js and Google API

Pros: It generates choropleth maps directly from database or other standard data handlers. Fast for small area mapping.

Cons:
Understanding of JavaScript is needed. It supports only US (County and State level data). I got performance is worst if we map entire 50 states. I recommend it to use to map few states only. Although cartographer.js's documentation claims browser friendly, it is horrible with IE, works so so with Firefox and chrome. 

Sunday, May 15, 2011

New way of Mapping : Crisis Mapping

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The above video about the uses of cell phone for mapping to help disaster victims world wide. This method was initially built for Haiti earthquake disaster, then used by Japan, and currently this technology is using in Alabama. Today, there are hundreds of volunteers in more than 50 countries creating maps of crises around the world via their cell phones
Watch the full episode. See more Need To Know.

Tuesday, May 3, 2011

Map re-projection in ArcMap or ArcGIS

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Here, I am trying to show how to project/re-project US shape file into AEA conic USGS projection using ArcMap.

Follow the following steps:

1. Right click on Layer -> click on Coordinate System

2. Unfold Predefined -> Unfold GCS -> Unfold North America

3. Select North American Datum 1983

4. Click Apply and Click OK

5. Add Feature Data (Points/Lines/Polygons)

6. A warning may appears but ignore it.

7. Find Data Management Tools -> Select Project (feature) Tool

8. Input Dataset or Feature Class (Enter the name of layer needed to be projected.)

9. Input Coordinate System -> Click on Hand icon -> Click Select -> Unfold GCS -> Unfold North America -> Select North American Datum 1983

10. Click Add

11. Click Apply and Click OK

12. Output Dataset or Feature Class (Enter the location of output file and location name: *.shp)

13. Output Coordinate Systemè Click on Hand icon -> Click Select -> Unfold PCS -> Unfold Continental -> Select North American -> Select USA Contiguous Albers Equal Area Conic USGS.prj

14. Click Apply and Click OK

15. New Projected map layer will be created. But  might not be able to see that projected layer in same data frame. Then what?

16. Trick: Add new data frame.. HOW?

17. Click Insert from Arc Map tool bar -> Click Data Frame

18. Drag projected map layer into it.

19. Cheers !!!  Your Map is projected.

20. If still problems persist; check on Environmental Variable Setting.
 

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