Macros Needed by Meteorological Applications

Directory name: applications/meteorology/macros

Other files in this directory:

• ComputeGeographicMeans.net (view/run it)
  This programs computes the meridional or zonal mean from a regular, geographic-based two-dimensional gridded data set.
• ComputeGroupMemberMeans.net (view/run it)
  Given a group or series, creates a list of the mean values of each member.
• CylindricalEquidistant.net (view/run it)
  A field, independent of rank, is transformed by the Cylindrical Equidistant cartographic (map) projection. The positions component of the field is warped according to the standard mapping equation without changing any of the data values. NO interpolation is performed. The positions are assumed to be in the following order: latitude, longitude and optionally altitude. Latitude is in degrees north (-90 to +90) and longitude is in degrees east (-180 to +180). If an altitude or other third component of the positions vector is present, it is passed unchanged. If the positions are not organized in this fashion, then they will have be transformed prior to invocation.
• IsoImage.net (view/run it)
  This macro creates a combined realization of pseudo-colored contour lines of specified increment and range overlaid on a pseudo-color image of a scalar field or filled contours. Outputs include the pseudo-colored field only, contour lines, and combined with contours, Data may be treated as either connection- or position-dependent for the pseudo-color image. The user provides colors for the contours and image. Optionally, normals may be placed on the image.
• LambertConformal.net (view/run it)
  A field, independent of rank, is transformed by the Lambert Confromal cartographic (map) projection. The positions component of the field is warped according to the standard mapping equation without changing any of the data values. NO interpolation is performed. The positions are assumed to be in the following order: latitude, longitude and optionally altitude. Latitude is in degrees north (-90 to +90) and longitude is in degrees east (-180 to +180). If an altitude or other third component of the positions vector is present, it is passed unchanged. If the positions are not organized in this fashion, then they will have be transformed prior to invocation. The two standard parallels should be specified.
• MapDrape.net (view/run it)
  Drapes a map (i.e., lines) over a surface (e.g., topography).

  The defaults are WDB I and 30-minute topography, both global.

• MapImageContourSurface.net (view/run it)
  This program provides conventional geographic mapping of scalar fields that are assumed to be on regular grids. The data are realized as a pseudo-color image overlaid with similarly pseudo-color mapped contours or pseudo-color surface with colors that are input to this macro. A fill value can be used to irregularize the data to implement cells where data are missing. The program supports four different cartographic map projections, which are implemented without interpolation via coordinate warping. The projections are Cylindrical Equidistant, Mollweide, Mercator and northern and southern hemisphere orthographic. The latter is not supported for non-regular data. The data are overlaid with conventional maps of world coastlines and political boundaries as well as fiduical lines. The Data Explorer Cartography toolkit is used to perform the geographic transformations.

  The data are courtesy of the National Space Science Data Center at NASA/Goddard Space Flight Center.

• MoveHorizontal.net (view/run it)
• Npole_orthographic.net (view/run it)
  A field, independent of rank, is transformed by a north pole orthographic cartographic (map) projection. The positions component of the field is warped according to the standard mapping equation without changing any of the data values. NO interpolation is performed. The positions are assumed to be in the following order: latitude, longitude and optionally altitude. Latitude is in degrees north (-90 to +90) and longitude is in degrees east (-180 to +180). If an altitude or other third component of the positions vector is present, it is passed unchanged. If the positions are not organized in this fashion, then they will have be transformed prior to invocation.
• Npole_stereographic.net (view/run it)
  A field, independent of rank, is transformed by a north pole stereographic cartographic (map) projection. The positions component of the field is warped according to the standard mapping equation without changing any of the data values. NO interpolation is performed. The positions are assumed to be in the following order: latitude, longitude and optionally altitude. Latitude is in degrees north (-90 to +90) and longitude is in degrees east (-180 to +180). If an altitude or other third component of the positions vector is present, it is passed unchanged. If the positions are not organized in this fashion, then they will have be transformed prior to invocation.
• PointProjections.net (view/run it)
  This program provides conventional geographic mapping of fields that are assumed to be on latitude-longitude points. The program supports four different cartographic map projections, which are implemented without interpolation via coordinate warping. The projections are Cylindrical Equidistant, Mollweide, Mercator, northern and southern hemisphere orthographic and spherical. The Data Explorer Cartography toolkit is used to perform the geographic transformations.
• Spole_orthographic.net (view/run it)
  A field, independent of rank, is transformed by a north pole orthographic cartographic (map) projection. The positions component of the field is warped according to the standard mapping equation without changing any of the data values. NO interpolation is performed. The positions are assumed to be in the following order: latitude, longitude and optionally altitude. Latitude is in degrees north (-90 to +90) and longitude is in degrees east (-180 to +180). If an altitude or other third component of the positions vector is present, it is passed unchanged. If the positions are not organized in this fashion, then they will have be transformed prior to invocation.
• Spole_stereographic.net (view/run it)
  A field, independent of rank, is transformed by a south pole stereographic cartographic (map) projection. The positions component of the field is warped according to the standard mapping equation without changing any of the data values. NO interpolation is performed. The positions are assumed to be in the following order: latitude, longitude and optionally altitude. Latitude is in degrees north (-90 to +90) and longitude is in degrees east (-180 to +180). If an altitude or other third component of the positions vector is present, it is passed unchanged. If the positions are not organized in this fashion, then they will have be transformed prior to invocation.
• StreamlineArrow.net (view/run it)
  Generates streamlines, optionally colored (e.g., fixed or pseudo-colored by magnitude), which show the direction of the vector field with small arrows. In some sense, this tool emulates the well-known and venerable STRMLN function of NCAR graphics. Currently this tool only operates correctly with 2d vector fields.
• UniformSample.net (view/run it)
  This macros samples the selected manifold at a set of more-or-less uniformly spaced samples on a surface of quads or within a volume of cubes. The parameter density, which is the approximate number of points that result, controls the spacing of the samples. The method by which the sample points are selected is different than that of Sample, which does not always produce a uniform distribution. The output of this macro is a set of unconnected positions. Any components in the original field manifold that are dependent on either positions or connections are mapped onto the resulting samples. In either case the dependency of the component in the output field will be dependent on the positions.
• WorldMapProjections.net (view/run it)
  This program provides conventional geographic mapping for the creation of world coastline and political map overlay with fiducial lines. The program supports four different cartographic map projections, which are implemented without interpolation via coordinate warping. The projections are Cylindrical Equidistant, Mollweide, Mercator, northern and southern hemisphere orthographic and spherical. The Data Explorer Cartography toolkit is used to perform the geographic transformations.
• asteroid.net (view/run it)
  Create an asteroid realization of a two-dimensional geographic scalar field by warping its positions from cartesian to spherical coordinates with radial deformation of a smooth sphere is derived from the data. Optionally, color and opacity maps can be imposed on the surface, which is registered in a three-dimensional, earth-centered coordinate system with a topographically derived globe.
• fiducials.net (view/run it)
  Create a grid of renderable lines to be used as fiducials for marking maps or geographically-located data. The grid can be subsequently warped by a cartographic projection prior to rendering. The user has control over the spacing and extent of the fiducials, their color and whether or not to indicate latitude-longitude values.
• globe.net (view/run it)
  Create a globe of the earth by taking a two-dimensional scalar field of the earth's topography (altitude above/below sea level), which has been cleverly colored, and warp it onto a sphere. The topography may be either mapped to a pseudo-color or gray scale. For the former, the color map has all values around and below 0 (as sea level) colored light blue, which increases in darkness with depth. For the latter, the gray scale map has all values around and below 0 (as sea level) colored gray, which increases in darkness with depth. Optionally, the globe may be radially deformed by topography to create a "bumpy" globe.

  It should be noted that some errors in the appearance of the globe may be visible due to biases introduced because of the limited resolution of the data set, which has been averaged to 30 minutes in latitude and longitude.

• mbSphere.net (view/run it)
  Macro for atmosphere, which adjusts pressure space for sphere warping
• mercator.net (view/run it)
  A field, independent of rank, is transformed by the Mercator cartographic (map) projection. The positions component of the field is warped according to the standard mapping equation without changing any of the data values. NO interpolation is performed. The positions are assumed to be in the following order: latitude, longitude and optionally altitude. Latitude is in degrees north (-90 to +90) and longitude is in degrees east (-180 to +180). If an altitude or other third component of the positions vector is present, it is passed unchanged. If the positions are not organized in this fashion, then they will have be transformed prior to invocation.
• mollweide.net (view/run it)
  A field, independent of rank, is transformed by the Mollweide cartographic (map) projection. The positions component of the field is warped according to the standard mapping equation without changing any of the data values. NO interpolation is performed. The positions are assumed to be in the following order: latitude, longitude and optionally altitude. Latitude is in degrees north (-90 to +90) and longitude is in degrees east (-180 to +180). If an altitude or other third component of the positions vector is present, it is passed unchanged. If the positions are not organized in this fashion, then they will have be transformed prior to invocation.
• projections.net (view/run it)
  This program provides conventional geographic mapping of fields that are assumed to be on a latitude-longitude grid. The program supports four different cartographic map projections, which are implemented without interpolation via coordinate warping. The projections are Cylindrical Equidistant, Mollweide, Mercator, northern and southern hemisphere orthographic, and spherical. The orthographic projections are implemented by slicing the data into two hemispheres by latitude grid. Therefore, it will only operate on regular grids, where the user supplies the grid resolution and south pole point. The Data Explorer Cartography toolkit is used to perform the geographic transformations.
• sphere.net (view/run it)
  A field, independent of rank, is transformed by warping it onto a sphere as a three-dimensional analog to traditional two-dimensional cartographic (map) projections. The positions component of the field is warped according to the standard cartesian to spherical coordinates transformation equation without changing any of the data values. NO interpolation is performed. The positions are assumed to be in the following order: latitude, longitude and optionally altitude. Latitude is in degrees north (-90 to +90) and longitude is in degrees east (-180 to +180). If an altitude or other third component of the positions vector is present, its values are added to the input radius of the sphere. If the positions are not organized in this fashion, then they will have be transformed prior to invocation.
• worldmap.net (view/run it)
  Create an object, which consists of a collection of 1247 lines containing over 100K distinct points. These points are derived from the World Data Bank I data set and compose a set of coastlines and political boundaries for the entire earth. The map has a default color of magenta. There is a choice of resolution (all lines), but use 1/4, 1/2 or all the points, or all points but no connecting lines.

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