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M_Map - mapping toolbox for Python

Python Version 0.0 - October 2017

You have collected your data, loaded it into Matlab, analyzed everything to death, and now you want to make a simple map showing how it relates to the world.

But you can't. Instead you have to figure out how to save all your data, and then read it into a mapping program, and then spend all that extra time figuring out why the mapping program doesn't give you what you expected it would... No more!

  • ** M_Map is a set of mapping tools originally written for Matlab v5. I am attempting to convert it to a python module so that it can be integrated with Jupyter Notebooks so that results and code can be shared more easily over the internet. **

  • M-Map for Matlab includes:

    1. Routines to project data in 18 different spherical projections (and determine inverse mappings)
    2. A grid generation routine to make nice axes with limits either in long/lat terms or in planar X/Y terms.
    3. A coastline database (with 1/4 degree resolution)
    4. A global elevation database (1 degree resolution)
    5. Hooks into freely available high-resolution coastlines and bathymetry/topography.

  • _Map v1.4 for Matlab is available via the web at

     http://www.eos.ubc.ca/~rich/

Toolbox contents

Readme.md    - This file
m_demo.m      - demonstrates a few different maps.

  • ** User-callable functions : ** m_map.

    m_proj - initializes projections m_coord - converts between geomagnetic and geographic coords.

    m_grid - draws grids m_scale - forces map to a given scale. m_ruler - draw a scale ruler

    m_ungrid - erases map elements (if you want to change parameters)

    m_coast - draws a coastline m_elev - draws elevation data from 1 degree database

    m_tbase - draws elevation data from 5-minute TerrainBase database m_gshhs - draws coastline from GSHHS with specified resolution m_gshhs_c - draws coastline from GSHHS crude database m_gshhs_l - draws coastline from GSHHS low-resolution database m_gshhs_i - draws coastline from GSHHS intermediate-resolution database m_gshhs_h - draws coastline from GSHHS high-resolution database m_gshhs_f - draws coastline from GSHHS full database m_plotbndry - draws a political boundary from the DCW m_usercoast - draws a coastline using a user-specified subset database. m_shaperead - reads ESRI shapefiles

    m_plot - draws line data in map coords m_line - draws line data in map coords m_text - adds text data in map coords m_legend - Draw a legend box m_quiver - draws arrows for vector data m_contour - draws contour lines for gridded data m_contourf - draws filled contours m_patch - draws patch data m_track - draws annotated tracklines m_hatch.m - hatched or speckled patches. m_range_ring - draws range rings (spherical coords) m_ellipse - draws tidal ellipses (most requested ocean feature!)

    m_ll2xy - converts from long/lat to map coordinates m_xy2ll - converts from map coordinates to long/lat

    m_geo2mag - converts from long/lat to geomagnetic coordinates m_mag2geo - converts from geomagnetic coordinates to long/lat

    m_lldist - spherical distance/geodesics between points (long/lat coordinates) m_xydist - spherical distance between points (map projection coordinates)

    m_fdist - ellipsoidal geodesic forward calculation m_idist - ellipsoidal geodesic inverse calculation m_geodesic - points along ellipsoidal geodesics

    m_tba2b - used in installing high-resolution elevation database.

    m_vec - fancy arrows

  • ** Internal functions (not meant to be user-callable) **

    private/mp_azim - azimuthal projections private/mp_cyl - cylindrical projections (equatorial) private/mp_conic - conic projections private/mp_tmerc - transverse cylindrical projections private/mp_utm - elliptical universal transverse cylindrical projections private/mp_omerc - oblique cylindrical projection

    private/mu_util - various utility routines private/mu_coast - routines to handle coastlines.

    private/mc_coords - coordinate systems based on different poles.

    private/clabel.m.OLD - patched version of clabel (matlab v5.1 version does not contain capabilities for different text properties). Not compatible with R2011b (and later)

    private/m_coasts.mat - coastline data

** HTML documentation **

map.html           - Home page, examples
private/mapug.html - User's guide
private/*gif       - examples.

Originally written for Matlab by : Rich Pawlowicz Dept. of Earth, Ocean, Atmospheric Sciences, Univ. of British Columbia, 6339 Stores Rd., Vancouver, B.C. CANADA V6T 1Z4 email: [email protected]