mapscript.mapObj

class mapscript.mapObj(*args)

The MAP object

Overview

The mapObj has the following relationships:

Attributes

cellsize	double Pixel size in map units
config	configObj const immutable TODO Add documentation
configoptions	hashTableObj immutable A hash table of configuration options from CONFIG keywords in the map - see CONFIG
datapattern	char TODO - Deprecated use VALIDATION .
debug	int See DEBUG
defresolution	double Default resolution - used to calculate the scalefactor, see DEFRESOLUTION
extent	rectObj Map extent array - see EXTENT
fontset	fontSetObj immutable See FONTSET
height	int See SIZE
imagecolor	colorObj Holds the initial image color value - see IMAGECOLOR
imagetype	char immutable Name of current outputformat
labelcache	labelCacheObj immutable We need this here so multiple feature processors can access it
layerorder	int Used to modify the order in which the layers are drawn - TODO should be immutable?
legend	legendObj immutable See LEGEND
mappath	char Path of the mapfile, all paths are relative to this path
maxlayers	int immutable Allocated size of layers[] array
maxsize	int See MAXSIZE
name	char Small identifier for naming etc - see NAME
numlayers	int immutable Number of layers in mapfile
numoutputformats	int immutable Number of output formats available in the map
outputformat	outputFormatObj immutable See OUTPUTFORMAT
querymap	queryMapObj immutable See QUERYMAP
refcount	int immutable Used for reference counting see RFC24
reference	referenceMapObj immutable See SCALEBAR
resolution	double See RESOLUTION
scalebar	scalebarObj immutable See SCALEBAR
scaledenom	double The nominal map scale, a value of 25000 means 1:25000 scale - see SCALEDENOM
shapepath	char Where are the shape files located - see SHAPEPATH
sldurl	char URL of SLD document as specified with "&SLD=..." WMS parameter d- currently this reference is used only in mapogcsld.c and has a NULL value outside that context
status	int Is map creation on or off - see STATUS
symbolset	symbolSetObj immutable See SYMBOLSET
templatepattern	char TODO - Deprecated use VALIDATION .
thisown	The membership flag
units	enum MS_UNITS Units of the projection - see UNITS
web	webObj immutable See WEB
width	int See SIZE

Methods

OWSDispatch(req: OWSRequest) → int

Processes and executes the passed OpenGIS Web Services request on the map. Returns MS_DONE (2) if there is no valid OWS request in the req object, MS_SUCCESS (0) if an OWS request was successfully processed and MS_FAILURE (1) if an OWS request was not successfully processed. OWS requests include WMS, WFS, WCS and SOS requests supported by MapServer. Results of a dispatched request are written to stdout and can be captured using the msIO services (i.e. mapscript.msIO_installStdoutToBuffer() and mapscript.msIO_getStdoutBufferString()

__init__(*args)

Create a new instance of mapObj. Note that the filename is optional.

appendOutputFormat(format: outputFormatObj) → int

Attach format to the map’s output format list. Returns the updated number of output formats.

applyConfigOptions() → void

Apply the defined configuration options set by setConfigOption()

applyDefaultSubstitutions() → void

Apply any default values defined in a VALIDATION block used for runtime substitutions

applySLD(sld: char) → int

Parse the SLD XML string sldxml and apply to map layers. Returns MS_SUCCESS or MS_FAILURE

applySLDURL(sld: char) → int

Fetch SLD XML from the URL sldurl and apply to map layers. Returns MS_SUCCESS or MS_FAILURE

applySubstitutions(names: char) → void

Pass in runtime substitution keys and values and apply them to the map. Note - this method is currently enabled for Python only. Typemaps are needed for other MapScript languages.

clone() → mapObj

Return an independent copy of the map, less any caches.

Note

In the Java & PHP modules this method is named cloneMap.

convertToString() → char

Saves the object to a string. Provides the inverse option for updateFromString.

draw() → imageObj

Draw the map, processing layers according to their defined order and status. Return an imageObj.

drawLabelCache(image: imageObj) → int

Draw map’s label cache on image. Returns MS_SUCCESS or MS_FAILURE.

drawLegend(scale_independent: int = 0) → imageObj

Draw map legend, returning an imageObj.

drawQuery() → imageObj

Draw query map, returning an imageObj.

drawReferenceMap() → imageObj

Draw reference map, returning an imageObj.

drawScalebar() → imageObj

Draw scale bar, returning an imageObj.

embedLegend(image: imageObj) → int

Embed map’s legend in image. Returns MS_SUCCESS or MS_FAILURE.

embedScalebar(image: imageObj) → int

Embed map’s legend in image. Returns MS_SUCCESS or MS_FAILURE.

freeQuery(qlayer: int = -1) → void

Clear layer query result caches. Default is -1, or all layers.

generateSLD(sldVersion: char = None) → char

Return SLD XML as a string for map layers that have STATUS on.

getConfigOption(key: char) → char

Fetches the value of the requested configuration key if set. Returns NULL if the key is not set.

getLayer()

Returns a reference to the layer at index i.

getLayerByName()

Returns a reference to the named layer.

getLayerOrder() → PyObject

Python MapScript only - returns the map layer order as a native sequence

getLayersDrawingOrder() → intarray

Returns an array of layer indexes in drawing order. Note Unless the proper typemap is implemented for the module’s language a user is more likely to get back an unusable SWIG pointer to the integer array.

getNumSymbols() → int

Return the number of symbols in map

getOutputFormat(i: int) → outputFormatObj

Returns the output format at the specified i index from the output formats array or null if i is beyond the array bounds. The number of outpuFormats can be retrieved by calling mapObj.getNumoutputformats().

getOutputFormatByName(name: char const) → outputFormatObj

Return the output format corresponding to driver name imagetype or to format name imagetype. This works exactly the same as the IMAGETYPE directive in a mapfile, is case insensitive and allows an output format to be found either by driver (like ‘AGG/PNG’) or name (like ‘png’).

getProjection() → char

Returns the PROJ definition of the map’s projection.

getRotation() → double

Returns the map rotation angle.

getSize() → PyObject

Python MapScript only - gets the map size as a tuple

getSymbolByName(name: char) → int

Return the index of the named symbol in the map’s symbolset.

Note

This method is poorly named and too indirect. It is preferable to use the getSymbolByName method of symbolSetObj, which really does return a symbolObj reference, or use the index method of symbolSetObj to get a symbol’s index number.

get_height()

Python MapScript only Return the map height from the map size

get_width()

Python MapScript only Return the map width from the map size

insertLayer()

Insert a copy of layer into the map at index. The default value of index is -1, which means the last possible index. Returns the index of the new layer, or -1 in the case of a failure.

loadMapContext(szFileName: char, useUniqueNames: int = 0) → int

Load an OGC map context file to define extents and layers of a map Returns MS_SUCCESS or MS_FAILURE

loadOWSParameters(*args) → int

Load OWS request parameters (BBOX, LAYERS, &c.) into map. Returns MS_SUCCESS or MS_FAILURE

loadQuery(filename: char) → int

Load a saved query. Returns MS_SUCCESS or MS_FAILURE

moveLayerDown(layerindex: int) → int

Move the layer at layerindex down in the drawing order array, meaning that it is drawn later. Returns MS_SUCCESS or MS_FAILURE

moveLayerUp(layerindex: int) → int

Move the layer at layerindex up in the drawing order array, meaning that it is drawn earlier. Returns MS_SUCCESS or MS_FAILURE

offsetExtent(x: double, y: double) → int

Offset the map extent based on the given distances in map coordinates. Returns MS_SUCCESS or MS_FAILURE.

pixelToGeoref(pixPosX: double, pixPosY: double, geoPos: pointObj) → void

TODO

prepareImage() → imageObj

Returns an imageObj initialized to map extents and outputformat.

prepareQuery() → void

TODO this function only calculates the scale or am I missing something?

processLegendTemplate(names: char, values: char, numentries: int) → char

Process MapServer legend template and return HTML. Note none of the three template processing methods will be usable unless the proper typemaps are implemented in the module for the target language.Currently the typemaps are not implemented.

processQueryTemplate(names: char, values: char, numentries: int) → char

Process MapServer query template and return HTML. Note none of the three template processing methods will be usable unless the proper typemaps are implemented in the module for the target language.Currently the typemaps are not implemented.

processTemplate(bGenerateImages: int, names: char, values: char, numentries: int) → char

Process MapServer template and return HTML. Note none of the three template processing methods will be usable unless the proper typemaps are implemented in the module for the target language.Currently the typemaps are not implemented.

queryByFeatures(slayer: int) → int

Query map layers, result sets contain features that intersect or are contained within the features in the result set of the MS_LAYER_POLYGON type layer at layer index slayer. Returns MS_SUCCESS or MS_FAILURE.

queryByFilter(string: char) → int

Query map layers using the filter string. Returns MS_SUCCESS or MS_FAILURE.

queryByPoint(point: pointObj, mode: int, buffer: double) → int

Query map layers, result sets contain one or more features, depending on mode, that intersect point within a tolerance buffer. Returns MS_SUCCESS or MS_FAILURE.

queryByRect(rect: rectObj) → int

Query map layers, result sets contain features that intersect or are contained within the features in the result set of the MS_LAYER_POLYGON type layer at layer index slayer. Returns MS_SUCCESS or MS_FAILURE.

queryByShape(shape: shapeObj) → int

Query layer based on a single shape, the shape has to be a polygon at this point. Returns MS_SUCCESS if shapes were found or MS_FAILURE if nothing was found or if some other error happened

removeLayer(index: int) → layerObj

Remove the layer at index. Returns the layerObj.

removeOutputFormat(name: char const) → int

Removes the format named name from the map’s output format list. Returns MS_SUCCESS or MS_FAILURE

save(filename: char) → int

Save map to disk as a new map file. Returns MS_SUCCESS or MS_FAILURE

saveMapContext(szFileName: char) → int

Save map definition to disk as OGC-compliant XML. Returns MS_SUCCESS or MS_FAILURE

saveQuery(filename: char, results: int = 0) → int

Save query to disk. Returns MS_SUCCESS or MS_FAILURE

saveQueryAsGML(*args) → int

Save query to disk. Returns MS_SUCCESS or MS_FAILURE

scaleExtent(zoomfactor: double, minscaledenom: double, maxscaledenom: double) → int

Scale the map extent using the zoomfactor and ensure the extent within the minscaledenom and maxscaledenom domain. If minscaledenom and/or maxscaledenom is 0 then the parameter is not taken into account. Returns MS_SUCCESS or MS_FAILURE

selectOutputFormat(imagetype: char const) → void

Set the map’s active output format to the internal format named imagetype. Built-in formats are “PNG”, “PNG24”, “JPEG”, “GIF”, “GTIFF”.

setCenter(center: pointObj) → int

Set the map center to the given map point. Returns MS_SUCCESS or MS_FAILURE.

setConfigOption(key: char, value: char) → void

Set the indicated key configuration option to the indicated value. Equivalent to including a CONFIG keyword in a map file.

setExtent(minx: double, miny: double, maxx: double, maxy: double) → int

Set the map extent, returns MS_SUCCESS or MS_FAILURE. This method will correct the extents (width/height ratio) before setting the minx, miny, maxx, maxy values. See extent properties to set up a custom extent from rectObj.

setFontSet(filename: char) → int

. Load fonts defined in filename into map fontset. The existing fontset is cleared.

Returns MS_SUCCESS or MS_FAILURE

setImageType(imagetype: char const) → void

Sets map outputformat to the named format.

Note

mapObj.setImageType() remains in the module but its use is deprecated in favor of mapObj.selectOutputFormat().

setLayerOrder(order: PyObject) → int

Python MapScript only - sets the map layer order using a native sequence

setLayersDrawingOrder(panIndexes: int) → int

Set map layer drawing order. Note Unless the proper typemap is implemented for the module’s language users will not be able to pass arrays or lists to this method and it will be unusable.

setOutputFormat(format: outputFormatObj) → void

Sets map outputformat.

setProjection(proj4: char) → int

Set map projection from PROJ definition string proj4.

setRotation(rotation_angle: double) → int

Set map rotation angle. The map view rectangle (specified in EXTENTS) will be rotated by the indicated angle in the counter- clockwise direction. Note that this implies the rendered map will be rotated by the angle in the clockwise direction.

Returns MS_SUCCESS or MS_FAILURE

setSize(width: int, height: int) → int

setSymbolSet(szFileName: char) → int

Load symbols defined in filename into map symbolset. The existing symbolset is cleared. Returns MS_SUCCESS or MS_FAILURE

setWKTProjection(wkt: char) → int

Sets map projection from OGC definition wkt.

set_height(value)

Python MapScript only Set the map height value of the map size

set_width(value)

Python MapScript only Set the map width value of the map size

zoomPoint(zoomfactor: int, poPixPos: pointObj, width: int, height: int, poGeorefExt: rectObj, poMaxGeorefExt: rectObj) → int

Zoom by the given factor to a pixel position within the width and height bounds. If max_extent is not NULL, the zoom is constrained to the max_extents

Returns MS_SUCCESS or MS_FAILURE

zoomRectangle(poPixRect: rectObj, width: int, height: int, poGeorefExt: rectObj, poMaxGeorefExt: rectObj) → int

Set the map extents to a given extents. Returns MS_SUCCESS or MS_FAILURE on error

zoomScale(scale: double, poPixPos: pointObj, width: int, height: int, poGeorefExt: rectObj, poMaxGeorefExt: rectObj) → int

Zoom by the given factor to a pixel position within the width and height bounds. If max_extent is not NULL, the zoom is constrained to the max_extents