Otherwise, if the data set coordinates are unprojected (in a geographicĬoordinate system), use the parameter-value pairĬoordinate Types. The data set coordinates are already projected (in a map coordinate system). Mapstructs and Geostructsīy default, shaperead returns a mapstruct containing Imported with (or subsequently added to) the geostruct or mapstruct applies toĪll the feature's parts in combination. It is not possible to assign distinct attributes to theĭifferent parts of such a feature any character vector or numeric attribute Each disconnected part is separated fromĭetermine if a feature has NaN-separated parts.Įach multipoint or NaN-separated multipart line or polygon entity constitutesĪ single feature and thus has one character vector or scalar double value perĪttribute field. The parts can includeĬounterclockwise inner rings that outline "holes." For an illustration of this, Parts-disconnected line segments and polygon rings. Polygon geometries, individual features can have multiple In geographic data structures with Line or There are usually multiple attributes.Īny 3-D or "measured" shape types: 'PointZ',Īlthough 'Null Shape' features can be present in a Usually by substituting underscores for spaces. Shaperead assigns the field an appropriately modified name, If a shapefile attribute name cannot be directly used as a field name, Shaperead function determines the names of the attributeįields at run-time from the shapefile xBASE table or from optional, user-specified The shaperead function reads vector features and attributesįrom a shapefile and returns a geographic data structure array.
The Contents of Geographic Data Structures shp,Įxample, given the base name 'concord_roads' the shapefile file All three files have the same base nameĪnd are distinguished by the extensions. Main file, an index file, and an xBASE file. Multipoints, lines, or polygons, along with non-geometrical attributes.Ī shapefile stores attributes and coordinates in separate files it consists of a Shapefiles encode coordinates for points,
The Environmental Systems Research Institute designed the Geographic data structures most frequently originate when vector geodata is For more informationĪbout geospatial tables, see Create Geospatial Tables. Tables are table or timetable objects with a Geographic data structures hold only vectorįeatures and cannot be used to hold raster data (regular or geolocated data grids orĪlternatively, you can represent vector data by using geospatial tables. Geostruct, and one that holds map coordinates (projected Geographic coordinates (latitude and longitude) is called a Is represented by coordinates and attributes. Manipulating collections of vector map features organized in geographic dataĪ geographic data structure is a MATLAB ® structure array that has one element per geographic feature.
DIFFERENTIAITE BETWEEN VECTOR AND RASTER DATA STRUCTURE SOFTWARE
Mapping Toolbox™ software provides an easy means of displaying, extracting, and
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