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  • 21 Aug, 2019

  • By, Wikipedia

Template:Location Map Many

Template:Location map many creates a location map as a composite image of an existing map, with multiple markers and optional labels superimposed onto it. This template functions in the style of Template:Location map, but allows multiple markers and labels (rather than just one marker).

See also Template:Location map+, which specifies points as a coded template list of markers/labels.

Usage

The first unnamed parameter (shown as {{{1}}} below) specifies a map definition. If {{{1}}} is Spain, the map image and coordinates are based on the values defined for Spain in Module:Location map/data/Spain if it exists, or in Template:Location map Spain otherwise.

{{Location map many
| {{{1}}}
| width       = 
| float       = 
| border      = 
| caption     = 
| alt         = 
| relief      = 
| AlternativeMap = 
<!--first label/marker-->
| label1      =  <!-- or: label -->
| label1_size =  <!-- or: label_size -->
| position1   =  <!-- or: position, pos1, pos -->
| background1 =  <!-- or: background, bg1, bg -->
| mark1       =  <!-- or: mark -->
| mark1size   =  <!-- or: marksize -->
| link1       =  <!-- or: link -->
| coordinates1=  <!-- {{coord|...}}--><!-- or: coordinates-->
<!--second label/marker-->
| label2      = 
| label2_size = 
| label2_width=
| position2   =  <!-- or: pos2 -->
| background2 =  <!-- or: bg2 -->
| mark2       = 
| mark2size   = 
| link2       = 
| coordinates2= <!-- {{coord| }} -->
<!--repeat as needed-->
}}

Parameters

Map display parameters
Parameter Description
{{{1}}} Required. Use the name of the map as the first unnamed parameter. For example, specifying England will use the values for England in Module:Location map/data/England if it exists, or {{Location map England}} otherwise. See the examples below.
width Determines the width of the map in pixels. The default is 240. Do not include px, for example: width=300, not width=300px.
float Specifies the position of the map on the page. Valid values are left, right, center and none. The default is right.
border Specifies the color of the 1px map border. The default is lightgrey (see web colors). If set to none, no border will be generated. This parameter is seldom used.
caption The text of a caption to be displayed below the map. Specifying a caption will cause the map to be displayed with a frame. If caption is defined but is not assigned a value, the map will not be framed and no caption will be displayed. If caption is not defined, the map will not be framed and a default caption will be generated. The default caption is created from the label parameter (or the current page name if label not defined) and the name parameter from map definition template. See the examples below.
alt Alt text for map; used by screen readers, see WP:ALT.
relief Any non-blank value (1, yes, etc.) will cause the template to display the map specified in the map definition template as image1, which is usually a relief map. Numerical values such as 2 or 3 will display image2 or image3, if those images are defined. See the example at Location map+/relief.
AlternativeMap Allows the use of an alternative map. The image must have the same edge coordinates as the location map template. See the example at Location map+/AlternativeMap.
overlay_image Allows an overlay to be superimposed on the map. This parameter is seldom used. See the example at Location map+/overlay.
Label and mark parameters
Parameter Description
label1
label2
...
The text of the label to display next to the mark. A wiki link can be used. The default if not specified is no label, just the marker.
label1_size
label2_size
...
The font size to use for the label, given as a percentage of the normal font size (<100 = smaller, >100 = larger). The default is 90. Do not include %, for example: label_size=80, not label_size=80%.
label1_width
label2_width
...
The width to use for the label, given as an em size; the default width is 6. Do not include em, for example: label_width=7, not label_width=7em.
position1
position2
...
The position of the label relative to the mark. Valid values are left, right, top and bottom. The default is right.
background1
background2
...
The background color to use for the label. See Web colors. The default is no background color, which shows the map image behind the label.
mark1
mark2
...
The name of an image to display as the mark. The default is Red pog.svg (). See examples at Commons:Location markers and Commons:Category:Map icons.
mark1size
mark2size
...
The size of the mark in pixels. The default is 8. Do not include px, for example: marksize=10, not marksize=10px.
link1
link2
...
Specifies a wiki link which will be followed if the reader clicks on the mark. The name of the linked article is displayed when the mouse pointer hovers over the mark.
coordinates1
coordinates2
...
Required. The coordinates using a {{coord}} template. See the Alternative syntax section below for alternatives.

Note: For brevity, parameters "pos" & "bg" are aliases (for "position" & "background"), with pos2, bg2, pos3, bg3, etc.

Alternative syntax

The recommend input format for the marker coordinates is to use |coordinatesX={{coord|...}}, where X is the marker number. However, when used outside of infoboxes, the template supports splitting the coordinates into individual components using the parameters listed below.

Alternative map display parameters
Parameter Description
lat1_deg
lat2_deg
...
The degrees of latitude. This value can be specified using decimal degrees and when this format is used minutes and seconds should not be specified.
lat1_min
lat2_min
...
The minutes of latitude.
lat1_sec
lat2_sec
...
The seconds of latitude. Usually not necessary.
lat1_dir
lat2_dir
...
N if north (default value) or S for south of the Equator. Other values will be disregarded. Not required if using signed decimal degrees (i.e. negative numbers for southern latitude).
lon1_deg
lon2_deg
...
The degrees of longitude. This value can be specified using decimal degrees and when this format is used minutes and seconds should not be specified.
lon1_min
lon2_min
...
The minutes of longitude.
lon1_sec
lon2_sec
...
The seconds of longitude. Usually not necessary.
lon1_dir
lon2_dir
...
E for east (default value) or W for west of the Prime Meridian. Other values will be disregarded. Not required if using signed decimal degrees (i.e. negative numbers for western longitude).

Markers

When a marker's mark#size=0, then that marker is skipped and only the related label is displayed, without the marker.

Each mark, mark2, mark3 (etc.) can be another image-symbol, such as Diamond sheer red 20.gif (marksize=20) to show a red diamond on the image: or use: Cercle rouge 100%.svg to show a red circle or a larger black diamond: Diamond sheer black 37.gif as sized with a larger marksize=37 or similar number to resize the diamond somewhat:

See Wikimedia pointer symbols: commons:Category:Map pointers.

Advisory messages

The degrees of latitude/longitude are validated, to show error messages, but location minutes can be set very large to place markers outside the map (with no warnings). Due to the numerous details of specifying multiple markers/labels, the latitude and longitude are checked to lie within the actual map limits specified in Template:Location_map_<parameter1>. Each marker/label is checked and can list a warning message (under the map), such as:

Latitude#4 (45.68) < map min(53.74).

Processing continues, with that marker actually placed off-map, and all latitude/longitude parameters are checked. Only degrees of latitude/longitude are checked, so a value of 63 minutes would be valid to indicate 1 extra degree + 3 minutes, and setting lon_min=200 could still place a marker off-map (right-side) with no warning message. Also, large markers or long labels can spill over the edges of a map, allowing markers to point inward from outside the map. In such cases, a map could be centered by itself on the page ("float=center") to avoid overlapping the edge markers onto any surrounding article text.

Available maps

Location maps can be found using these sources:

Special:PrefixIndex/Module:Location map/data/ - Checked before a map template is searched for. New maps should be created here rather than creating new templates.
List of templates - 1050 templates available when the list was generated.
Category:Location map templates - templates sorted by category.
Special:WhatLinksHere/Template:Location map/Info - a search that might help.
Special:Prefixindex/Template:Location map - another search that might help.

Creating new map definitions

See Creating a new map definition.

Examples

Map with label "Pag" and "Anytown" (degrees)

Recommended syntax

Location map many is located in Croatia
Pag
Pag
Anytown
Anytown
Location map many (Croatia)
{{Location map many | Croatia
| width = 280
| float = right
| label = Pag
  | marksize = 8
  | pos = right
  | bg = yellow
  | coordinates = {{coord|44|26|N|15|3|E}}
| label2 = Anytown
  | mark2 = Black pog-sized x.svg
  | mark2size = 18
  | pos2 = bottom
  | coordinates2 = {{coord|46|30|N|18|0|E}}
}}

Alternative syntax

Location map many is located in Croatia
Pag
Pag
Anytown
Anytown
Location map many (Croatia)
{{Location map many | Croatia
| width = 280
| float = right
| label = Pag
  | marksize = 8
  | pos = right
  | bg = yellow
  | lat_deg = 44 | lat_min = 26
  | lon_deg = 15 | lon_min = 3
| label2 = Anytown
  | mark2 = Black pog-sized x.svg
  | mark2size = 18
  | pos2 = bottom
  | lat2_deg = 46 | lat2_min = 30
  | lon2_deg = 18 | lon2_min = 0
}}

Map with 3 labels (decimal), alternative relief maps

Using relief maps from Module:Location map/data/Croatia

Location map many is located in Croatia
Pag
Pag
Anytown
Anytown
Anytown2
Anytown2
Location map many (Croatia)
{{Location map many | Croatia
| width = 260
| relief= yeah
| float = right
| label = Pag
  | pos = right
  | marksize = 8
  | coordinates = {{coord|44.44|15.05}}
| label2 = Anytown
  | pos2 = left
  | bg2 = #fff8
  | mark2size = 8
  | coordinates2 = {{coord|45.86|17.50}}
| label3 = Anytown2
  | pos3 = top
  | bg3 = #afa8
  | coordinates3 = {{coord|46.23|18.43}}
}}
Location map many is located in Croatia
Pag
Pag
Anytown
Anytown
Anytown 2
Anytown 2
Location map many (Croatia)
{{Location map many | Croatia
| width = 260
| relief= 3
| float = right
| label = Pag
  | pos = left
  | bg = #ffaa
  | marksize = 12
  | coordinates = {{coord|44.44|15.05}}
| label2 = Anytown
  | pos2 = right
  | bg2 = #fff8
  | mark2size = 8
  | coordinates2 = {{coord|45.86|17.50}}
| label3 = Anytown 2
  | pos3 = left
  | bg3 = #afa8
  | coordinates3 = {{coord|46.23|18.43}}
}}

Example map with red diamond

Location map many
Cuba
Cuba
{{Location map many | 100x100
| AlternativeMap = LocationJamaica.svg
| float = right
| width = 250
| caption = Site of '''Hispaniola'''
| label = Hispaniola
  | position = left
  | background = #CCDDFF
  | marksize = 1
  | coordinates = {{coord|38.2|69.3}}
| label2 =
  | mark2 =Diamond_sheer_red_37.png
  | mark2size = 42
  | coordinates2 = {{coord|52.2|73.9}}
| label3 = Cuba
  | pos3 = left
  | mark3size = 1
  | coordinates3 = {{coord|59.2|68.0}}
}}

Map with some labels outside map

Location map many is located in Croatia
Pag
Pag
Anytown
Anytown
Anytown2
Anytown2
North Croatia
Location map many (Croatia)
{{Location map many | Croatia
| width = 260
| float = right
| label = Pag | position=right
  | marksize = 8
  | coordinates = {{coord|44.44|15.05}}
| label2 = Anytown
  | pos2 = bottom
  | bg2 = yellow
  | coordinates2 = {{coord|47.40|12.80}}
  | outside2 = 1 <!-- we know this point is outside the map, so don't warn about it -->
| label3 = Anytown2
  | pos3 = top
  | bg3 = lightgreen
  | coordinates3 = {{coord|41.98|18.43}}
  | outside3 = 1 <!-- we know this point is outside the map, so don't warn about it -->
| label4 = North Croatia
  | pos4 = left
  | bg4 = lightgreen
  | mark4size = 0
  | coordinates4 = {{coord|46.22|17.7}}
}}

Map with 9 markers (decimal)

Location map many is located in Croatia
Pag
Pag
Anytown
Anytown
Anytown2
Anytown2
44.0 (latitude)
44.0 (latitude)
44.5
44.5
45.0
45.0
45.5
45.5
46.0
46.0
CROATIA
CROATIA
Location map many (Croatia)
{{Location map many | Croatia
| width = 260
| float = right
| label = Pag
  | position = right
  | coordinates = {{coord|44.44|15.05}}
| label2 = Anytown
  | label2_size = 110
  | pos2 = bottom
  | background2 = #ffff8877
  | coordinates2 = {{coord|45.86|17.50}}
| label3 = Anytown2
  | label3_size = 110
  | pos3 = top
  | background3 = #8f87
  | coordinates3 = {{coord|46.23|18.43}}
| mark4 =Diamond_sheer_black_20.png
  | mark4size = 19
  | label4 = 44.0 (latitude)
  | coordinates4 = {{coord|44.00|13.5}}
| mark5 =Diamond_sheer_black_20.png
  | mark5size = 20
  | label5 = 44.5
  | coordinates5 = {{coord|44.50|13.5}}
| mark6 =Diamond_sheer_black_20.png
  | mark6size = 20
  | label6 = 45.0
  | coordinates6 = {{coord|45.00|13.5}}
| mark7 =Diamond_sheer_black_20.png
  | mark7size = 20
  | label7 = 45.5
  | coordinates7 = {{coord|45.50|13.5}}
| mark8 =Diamond_sheer_black_20.png
  | mark8size = 20
  | label8 = 46.0
  | coordinates8 = {{coord|46.00|13.5}}
| label9 = ''CROATIA''
  | mark9size = <!--label only-->1
  | label9_size = 165
  | coordinates9 = {{coord|42.60|14.4}}
}}

Map with a custom label and text background

{{Location map many | Croatia
| width = 280
| float = right
| caption = Imotski in Croatia
| label = Imotski
| position = right
| background = #FFFFDD
| coordinates = {{coord|43.44|17.21}}
}}

Map with enlarged marker and label

{{Location map many | Croatia
| width = 260
| float = right
| caption = Pag Island in Croatia
| label = Pag
| label_size = 200
| position = right
| marksize = 14
| background = #FFFFDD
| coordinates = {{coord|44.44|15.05}}
}}

Map with no caption

Location map many is located in Bosnia and Herzegovina
Brčko
Brčko
{{Location map many | Bosnia
| width = 150
| float = right
| caption =
| label = Brčko
| position = left
| coordinates = {{coord|44.87|18.81}}
}}

Western Hemisphere

{{Location map many | United Kingdom
| width = 180
| float = right
| caption = Lockerbie in Scotland
| label = Lockerbie
| position = right
| coordinates = {{coord|55|07|16|N|3|21|19|W}}
}}

Map that crosses 180° meridian

Module:Location map/data/Russia Chukotka Autonomous Okrug is an example of a map that crosses the 180th meridian. To the west of 180°, in the Eastern Hemisphere, is Pevek at 170°17′E longitude. To the east of 180°, in the Western Hemisphere, is Uelen at 169°48′W longitude.

Uelen
Uelen
{{Location map many
| Russia Chukotka Autonomous Okrug
| float        = right
| width        = 250
| caption      = [[Chukotka Autonomous Okrug]]
| label1       = Pevek
| coordinates1 = {{coord|69|42|N|170|17|E}}
| label2       = Uelen
| coordinates2 = {{coord|66|09|N|169|48|W}}
}}

Marker examples

Pfeil unten.svg
Pfeil unten.svg
Pfeil rechts.svg
Pfeil rechts.svg
Pfeil links.svg
Pfeil links.svg
Pfeil rechts oben.svg
Pfeil rechts oben.svg
Pfeil rechts unten.svg
Pfeil rechts unten.svg
Pfeil links oben.svg
Pfeil links oben.svg
Pfeil links unten.svg
Pfeil links unten.svg
Point carte.svg
Point carte.svg
Square city locator.png
Square city locator.png
Red.svg
Red.svg
Solid blue.svg
Solid blue.svg
Fadenkreuz.svg
Fadenkreuz.svg
Crosshairs Red.svg
Crosshairs Red.svg
Purple pog.svg
Purple pog.svg
Yellow pog.svg
Yellow pog.svg
Map-Pin.png
Map-Pin.png
Dot-yellow.svg
Dot-yellow.svg
Blue-circle.gif
Blue-circle.gif
Flashspot.gif
Flashspot.gif
Location dot blue.svg
Location dot blue.svg
Location dot black.svg
Location dot black.svg
Arrows 12x12 nw.svg
Arrows 12x12 nw.svg
Arrows 12x12 ne.svg
Arrows 12x12 ne.svg
Fire.svg
Fire.svg
Black triangle2.svg
Black triangle2.svg
Blue Fire.svg
Blue Fire.svg
City locator Montagne.svg
City locator Montagne.svg
Cercle rouge 100%.svg
Cercle rouge 100%.svg
White flag icon.svg
White flag icon.svg
Legenda miejsce bitwy.svg
Legenda miejsce bitwy.svg
X solid black 17.gif
X solid black 17.gif
City locator 1.svg
City locator 1.svg
City locator 2.svg
City locator 2.svg
City locator 6.svg
City locator 6.svg
City locator 7.svg
City locator 7.svg
City locator 8.svg
City locator 8.svg
City locator 9.svg
City locator 9.svg
City locator 10.svg
City locator 10.svg
City locator 11.svg
City locator 11.svg
City locator 13.svg
City locator 13.svg
City locator 21.svg
City locator 21.svg
City locator 29.svg
City locator 29.svg
Point rouge croix frontier vert green.svg
Point rouge croix frontier vert green.svg
Wikipedia-Marker-4.png
Wikipedia-Marker-4.png
StarArrowOR.svg
StarArrowOR.svg
Castle.svg
Castle.svg
Crime_symbol_handgun_czeska80px.png
Crime_symbol_handgun_czeska80px.png
Gwiazda LnM.svg
Gwiazda LnM.svg
Nuclear plant.svg
Nuclear plant.svg
Quake pointer.svg
Quake pointer.svg
Rotonda S7.svg
Rotonda S7.svg
Wikipedia-Marker-isle.svg
Wikipedia-Marker-isle.svg
BSicon dB+Slg.svg
BSicon dB+Slg.svg
BSicon ANCHOR.svg
BSicon ANCHOR.svg
BSicon fSKRZ-Bu.svg
BSicon fSKRZ-Bu.svg
Location map many
BSicon xtGRENZE.svg
BSicon xtGRENZE.svg
Unesco Cultural Heritage logo.svg
Unesco Cultural Heritage logo.svg
Mining symbol.svg
Mining symbol.svg
Zoo icon.jpg
Zoo icon.jpg
Vattenfall blue.svg
Vattenfall blue.svg
SymbolAirport.svg
SymbolAirport.svg
See Wikimedia pointer symbols: commons:Category:Map pointers.

Implementation notes

The map with markers/labels is implemented as nested HTML divisions. The map-image is in an HTML division, containing each point as a percent-locator division containing a marker-image sub-division plus a label sub-division. Each point is calculated (for a percent-locator division) with X or Y coordinate "XX.X%" or "YY.Y%" as follows:

  • The div-tag is <div style="position: absolute; z-index: 2; top: XX.X%; left: YY.Y%; ...">
  • For placing latitude, the calculation is:
    XX.X% = 100 * (top - (lat_deg + latmin/60 +latsec/3600) ) / (top - bottom)
    If lat_deg is empty, the combined decimal latitude is used from "lat".
    If lat_dir is "S" (south), the latitude is multiplied by -1.
    (Note latitude is positioned in reverse, from top of map downward.)
  • For placing longitude, the calculation is:
    YY.Y% = 100 * ( (lon_deg + lonmin/60 +lonsec/3600) - left ) / (right - left)
    If lon_deg is empty, the combined decimal longitude is used as "long".
    If lon_dir is "W" (west), the longitude is multiplied by -1.
  • The div-tag is ended as "height: 0; width: 0; margin: 0; padding: 0;"&gt;.
  • Within that division the marker/label sub-divisions are coded as:
    <div style="position: relative text-align: center; ...">.
  • For label position, the options are shifted as:
    when position:left, adds left: -6.5em; text-align: right;
    when position:right, adds left: 0.5em; text-align: left;"
    when position:top, adds top:-2.65em; left:-3em; text-align: center;"
    when position:bottom, adds top:-0.15em; left: -3em; text-align: center;" to div-tag.

TemplateData

This is the TemplateData for this template used by TemplateWizard, VisualEditor and other tools. See a monthly parameter usage report for Template:Location map many in articles based on its TemplateData.

TemplateData for Location map many

Use this template to add several pushpins (eg for businesses or events with several locations) on a single map.

Template parameters[Edit template data]

ParameterDescriptionTypeStatus
Map1

Which map to use. Consult Template:Location map/List for the full list.

Example
Albania
Stringrequired
Widthwidth

The width in pixels. If not specified, it defaults to 240. This should be a number only.

Example
300
Auto value
240
Numberoptional
Floatfloat

Where the map floats to on the page. Defaults to "right".

Suggested values
left right center none
Example
left
Stringoptional
Frame styleborder

What color the map's frame should be when the parameter caption is used. If not specified, it defaults to light grey. For no frame use 'none'. In infoboxes, use 'infobox'.

Suggested values
lightgrey grey red orange yellow green blue purple pink black white infobox none
Example
green
Unknownoptional
Captioncaption

The caption to be displayed below the map. If not specified, an automatically generated caption is used instead.

Example
This is a map of Loremipsumland.
Contentoptional
Alt textalt

Alt text, to be used for screen readers.

Example
A map of Loremipsumland, with points marking the locations of Dolor, Sit, Amet, Consectetur, Adipiscing, and Elit.
Unknownoptional
Reliefrelief

If set to anything except a blank value, the template uses a relief map instead. Use 2 for image2, etc.

Suggested values
1 yes 2 3
Example
yes
Stringoptional
Alternative mapAlternativeMap

An alternative map. Must have the same edge coordinates as the original map. Provide this as a file name.

Example
Example.png
Fileoptional
Overlay imageoverlay_image

An image to be superimposed on the original map (for example, if you want to highlight a region rather than just a point). Rarely used. Provide the name of a file.

Example
Example.png
Fileoptional
Label of first pointlabel1

The label of the first point on the map. May be wikilinked.

Example
Moscow
Contentrequired
Coordinates of first pointcoordinates1

The coordinates of the first point. Use the {{coord}} template.

Example
{{coord|1|2|3|N|4|5|6|E}}
Contentrequired
Label of second pointlabel2

The label of the second point on the map. May be wikilinked.

Example
Cambridge
Unknownsuggested
Coordinates of second pointcoordinates2

The coordinates of the second point. Use the {{coord}} template.

Example
{{coord|7|8|9|N|10|11|12|E}}
Contentsuggested
Label of third pointlabel3

The label of the third point on the map. May be wikilinked.

Example
Constantinople
Stringoptional
Coordinates of third pointcoordinates3

The coordinates of the third point. Use the {{coord}} template.

Example
{{coord|7|8|9|N|10|11|12|E}}
Contentsuggested
Label of fourth pointlabel4

The label of the fourth point on the map. May be wikilinked.

Example
Constantinople
Unknownsuggested
Coordinates of fourth pointcoordinates4

The coordinates of the fourth point. Use the {{coord}} template.

Example
{{coord|7|8|9|N|10|11|12|E}}
Contentsuggested
Label of fifth pointlabel5

The label of the fifth point on the map. May be wikilinked.

Example
Timbuktu
Unknownsuggested
Coordinates of fifth pointcoordinates5

The coordinates of the fifth point. Use the {{coord}} template.

Example
{{coord|7|8|9|N|10|11|12|E}}
Contentsuggested
Label of sixth pointlabel6

The label of the sixth point on the map. May be wikilinked.

Example
Mandaluyong
Unknownoptional
Coordinates of sixth pointcoordinates6

The coordinates of the sixth point. Use the {{coord}} template.

Example
{{coord|7|8|9|N|10|11|12|E}}
Contentoptional
Label of seventh pointlabel7

The label of the seventh point on the map. May be wikilinked.

Example
New York
Unknownoptional
Coordinates of seventh pointcoordinates7

The coordinates of the seventh point. Use the {{coord}} template.

Example
{{coord|7|8|9|N|10|11|12|E}}
Contentoptional
Label of eighth pointlabel8

The label of the eighth point on the map. May be wikilinked.

Example
Rome
Unknownoptional
Coordinates of eighth pointcoordinates8

The coordinates of the eighth point. Use the {{coord}} template.

Example
{{coord|7|8|9|N|10|11|12|E}}
Contentoptional
Label of ninth pointlabel9

The label of the ninth point on the map. May be wikilinked.

Example
Carthage
Unknownoptional
Coordinates of ninth pointcoordinates9

The coordinates of the ninth point. Use the {{coord}} template.

Example
{{coord|7|8|9|N|10|11|12|E}}
Contentoptional

See also

  • Wikipedia:Maps for Wikipedia, a list of mapping tools available on Wikipedia
  • {{Location map}} - Placing one marker/label by latitude/longitude.
  • {{Location map+}} - Placing unlimited list of markers/labels.
  • Commons:Category:Map pointers - List of the many Wikimedia Commons pointer symbols.
  • {{OSM Location map}} - OpenStreetMap map with an "interactive fullscreen" version. Allows for labels, numbered dots, a heading, caption, mini-locator map and overlays.
  • {{Overlay}} - Allows image number, textual number, or color tag overlays to be positioned over an image to indicate particular features in the image.