Indiemapper tools. Why “indiemapper”? -+ Easy Variety of maps/tools No registration Free...
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Transcript of Indiemapper tools. Why “indiemapper”? -+ Easy Variety of maps/tools No registration Free...
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Indiemapper tools
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http://indiemapper.com/
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Why “indiemapper”?
- +
Easy
Variety of maps/tools
No registration
Free
English only
Limited graphic tools
Non-available offline
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Historical note• It was developed as a tool useful to map-makers, whether
casual or professional, who may not need advanced functions of modern GIS, but do want a multitude of symbology and design options.
• First version was presented in 2008.
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GIS (Geographical Information Systems) tool-kit
Indiemapper
Visualise data
2D maps +3D maps -
Animations -Manipulate spatially
Calculate distances and adjacencies -Change projections and scales +
Integrate disparate sources +Analyse spatially
Quantitative analysis -Qualitative analysis +
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Libraries, shape files, own maps
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…To download*.kml, *.shp та *.gpx files
*.shp makes life easier…
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What is *.shp file? Nontopological format for storing the geometric location and attribute information of geographic features: • .shp – form• .shx – index• .dbf – attribute
Each of the component files of a shapefile is limited to 2 GB each!
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Free libraries of *.shp files:• http://www.diva-gis.org/gdata - maps for any
country in the world http://www.naturalearthdata.com/downloads/ - world political map
• http://geocommons.com/ - lots of different patterns
• http://www.mapmakerdata.co.uk.s3-website-eu-west-1.amazonaws.com/library/stacks/Africa/index.htm - Africa map library
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Graphical tools in Indiemapper
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Projections (perspective views of the Earth)
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Why projections?• Projections = coordinate system. • Projection converts coordinates on the round
Earth to coordinates on the flat map. • Each projection has distortions. • Choice of the “appropriate” projection is
determined by objectives.
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Different ways of visualization
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Cartograms• Re-sizes the global land masses
according to which variable is mapped. • Isolates one variable and provides a
different world view.
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Deaths due to HIV infections that progressed to AIDS – 2002
Territories are sized in proportion to the absolute number of people who died from HIV/AIDS in one year.
Map credits/source: WorldMapper, Map No. 374; http://www.worldmapper.org/display.php?selected=374#
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Proportional Symbols • Size of symbol is proportional to size of
data value.• The larger the symbol, the “more” of
something exists at a certain location.
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Map credits/source: created by K. Tummino (4/21/08), http://personal.frostburg.edu/kctummino0/HIV_prisons_square.jpg
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Choropleth Choros (place) plethos (filled)
When to use:(1) Data are attached to enumeration units
(countries, provinces)(2) Data are standardized to show rates or ratios
• Never use with raw data/counts!
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Map credits/source: WHO (2011), http://gamapserver.who.int/mapLibrary/Files/Maps/HIV_adult_prevalence_2011.png
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Dot Density • Describes density over area• 1 dot = some quantity of data value
• one-to-one dot density maps• one-to-many dot density maps
• You can map raw data/counts!
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Map credits/source: Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention (NCHSTP), Centers for Disease Control.
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Combining data sets
Map credits/source: https://www.flickr.com/photos/90884073@N07/8273784596/
• Population of African countries and % of their population living with AIDS
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Playing with intervalsMethods to create intervals in Indiemapper:• manually• equal intervals (ignores data distribution; unequal
number of observations in each interval)• “optimal” breaks (takes into account data
distribution)• quartiles (top 25%, 25% above middle, 25% below
middle, bottom 25%; equal number of observations are in each interval)
• standard deviations (mean+1s, mean-1s)
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Export in SVG, JPEG, PNG
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Additional instruments for efficient use of indiemapper• OpenOffice – editing of *.dbf files1
Steps:
1. Open *.dbf file in OpenOffice.
2. Add a new column with an indicator of interest.
3. Save the file in the same format (*.dbf )
• Inkscape – graphical tool: correction of legends, text notes etc.
Export your map as an *.svg file and open it in Inkscape. Use Inkscape to improve the look of the map.
1 If you use Excel, unless you have Excel 2003 or earlier, it will not save .dbf files – you will have to export to Access first!
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Missing data in *.dbf file • If table contains missing cells, *.dbf usually
assigns “0” value (starting level of the 1st rank). • It is common to assign “impossible” values like “-
99”.• So, we can use some different shading for this
data.
1 If you use Excel, unless you have Excel 2003 or earlier, it will not save .dbf files – you will have to export to Access first!