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Instructions for use of the Embedded Owlapps Maps technology

Feature currently under active development (early alpha testing)!

Basic setup

If you reached on this web page it's because you are trying to use the embedded Owlapps Maps technology and you did not reach to do this!
Firstable your web browser must accept the Security Exception for this URL: httpS://www.owlapps.net.


Security level of this website according to Sitechecker et Google Safe Browsing :
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More information here: Google Search for this
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That's all you need to do, see you later Navigator! Going further:

Online demos:


Allow users to have the ability to fully control the location where their geographic data in the KML format will be stored and to be able to them share (read-only) and view them easily with the 2D mapping web application from Owlapps.net.

Because Owlapps.net does not store or forward user data to its server.

KML tag support & implementation

the end is not to implement all the features available in the Google Earth software, only certain tags available in the KML language, already benefit from operational functionalities and those soon are listed below all this in a web and light context. Added to this is the possibility of defining geoUri in the form of hypertext links, for instance: <a href="geo:37.786971,-122.399677"> your_text </a>. These links converted into geolinks whose click will change the view of the map to go to the point defined by the latitude and longitude of the geoUri, no need geometry to create geolinks.
The KMZ (compressed KML) format is not supported or planned for the near and distant future.

Simplified functional diagram

Basic Structuration

In the HTML code of your web page be sure to have at least one occurence (one is enough) of this script tag:

Put it in the body tag part of your document.

An embedded map is in fact an iframe tag with those following params:

For instance:

As-a-childnode way: it's the second way to insert your KML, put it directly in your IFRAME tag (only 1 KML / IFRAME) as a child node instead as a property value! Prefer this second way because you don't have to escape single quotes (apostrophes) in the KML given to the data-owlappskml property.
For instance:

More than one KML in the same map is possible! Just put your iframe tags in the same div tag, this tag must have the data-owlappsmaplyrgroup param with this value: "yes".

For instance:

Advanced settings

The Owlapps.net Embedded Maps are based on Leaflet JS web mapping technology.

Including one Web Map Service (WMS) layer or more to the same iframe is possible, just fill in the "data-owlappslayers" property ( [ Javascript Object Notation format, Javascript Object Notation format, Javascript Object Notation format, etc... ] ).

Your object must have the "type" property set to "wms" .
Your layer as an Overlay layer (instead of Base layer) => set the "overlay" property to "yes" .

For instance:

Adding a video as an overlay (always as an Overlay layer): your object must have the "type" property set to "video" .

For instance:

Reminder: KML language and XML languages ​​in general are case sensitive (lower case vs. upper case), thus <Document> is not equal to <document>. In the KML language, some tags begin with a capital letter, others do not.

Containers and Features

Containers and Features, these terms are not those defined in the KML element diagram in the official documentation. This is a grouping specific to <embedMap/>.

Considered as a container

Considered as a feature

Snippet, description and name

<name> tag is available in <Document>, <Folder>, <NetworkLink>, <Placemark>, <ScreenOverlay> and <GroundOverlay>.

<Snippet> tag is available in <Document>, <Folder>, <NetworkLink>, <Placemark> and <GroundOverlay>, it has no size limit in <embedMap> app and can use the CDATA element.
Container <Snippet> is rendered as a message box with a blue colorway headband in the LeafletJS layer control panel.
Feature <Snippet> as for it is rendered with a pink/salmon mixed colorway headband in usual conf, grey colorway when no correct coordinates found and orange colorway when the geolink is directly in its snippet (see substitute cards part in this same page below).

<description> tag is available in <Placemark> and <GroundOverlay>, it is rendered as a popup appearing when you click on the corresponding geographic object.
<name> is also rendered in popup.

Reminder: in <Snippet> and <description> tags, apply the CDATA element ( <![CDATA[ your_html_tags ]]> ) to use HTML tags easily like hyperlinks, break lines, tables, div, span, p, etc. You can apply substitute cards and geoUri geolinks on it.

Substitute cards



Supported tags: <StyleMap> (only <key> normal value is supported), <Style>, <IconStyle>, <LineStyle>, <PolyStyle>, <color> (color and opacity; in IconStyle tag only opacity (2 first characters) is supported), <width>, <scale>, <Icon> (only <href> is supported), <hotSpot>.
HotSpot tag xunits and yunits properties are supported to, supported values: insetPixels | pixels | fraction .
Default params of <hotSpot>:
<hotSpot x="0.5" xunits="fraction" y="0.5" yunits="fraction"/>
The <scale> tag value (positive float) is based on 32 pixels (1 = 32 px, 2 = 64 px, 0.5 = 16px, 0.25 = 8px, etc). When an image is applied, if its width is smaller than its height then width = 32 px, if height is smaller than width then height = 32px, the image ratio is preserved.

Reference system and example:
Extreme western end of the Île De La Cité in Paris (France), latitude = 48.85777 and longitude = 2.33935 (decimal degrees coordinates).

For instance:

Reminder: The <color> tag color system is based on the hexadecimal aabbggrr (alpha alpha blue blue green green red red) format value, not this one: rrggbb (red red green green blue blue)!
the aa (alpha alpha) value is the opacity level (100% = FF; 0% = 00).
For instance, the SALMON color (FA8072) with a 40% opacity ( hex value: 66, table below) will be in fact: 667280FA

Opacity (%) — hexadecimal matching value table:
100% — FF
99% — FC
98% — FA
97% — F7
96% — F5
95% — F2
94% — F0
93% — ED
92% — EB
91% — E8
90% — E6
89% — E3
88% — E0
87% — DE
86% — DB
85% — D9
84% — D6
83% — D4
82% — D1
81% — CF
80% — CC
79% — C9
78% — C7
77% — C4
76% — C2
75% — BF
74% — BD
73% — BA
72% — B8
71% — B5
70% — B3
69% — B0
68% — AD
67% — AB
66% — A8
65% — A6
64% — A3
63% — A1
62% — 9E
61% — 9C
60% — 99
59% — 96
58% — 94
57% — 91
56% — 8F
55% — 8C
54% — 8A
53% — 87
52% — 85
51% — 82
50% — 80
49% — 7D
48% — 7A
47% — 78
46% — 75
45% — 73
44% — 70
43% — 6E
42% — 6B
41% — 69
40% — 66
39% — 63
38% — 61
37% — 5E
36% — 5C
35% — 59
34% — 57
33% — 54
32% — 52
31% — 4F
30% — 4D
29% — 4A
28% — 47
27% — 45
26% — 42
25% — 40
24% — 3D
23% — 3B
22% — 38
21% — 36
20% — 33
19% — 30
18% — 2E
17% — 2B
16% — 29
15% — 26
14% — 24
13% — 21
12% — 1F
11% — 1C
10% — 1A
9% — 17
8% — 14
7% — 12
6% — 0F
5% — 0D
4% — 0A
3% — 08
2% — 05
1% — 03
0% — 00

Child node of <Style> tag, it gives the possibility to display the value of the Placemark <name> tag in a label on the map. This tag has a child node : <the scale> tag, it's a positive float value that will used as a font-size em unit.

Child nodes of LabelStyle tag to: <minZoom> and <maxZoom> (positive integer value), they are not KML standard tags, especially created for the embedMap app. They control the maximum and minimum zoom level of visibility (or not) of your label, they can be used alone or together, bigest value allowed: 18 (ground level), smallest value allowed: 0 (geostationary orbit level).
For instance:

Zoom levels on the Paris' Pyramide Du Louvre applied to the OpenStreetMap layer

Zoom level: 18

Zoom level: 17

Zoom level: 14

Zoom level: 11

Zoom level: 8

Zoom level: 6


Not supported

<colorMode>, <heading>, <visibility>, <phoneNumber>, <xal:AddressDetails>, <address>, <atom:link>, <atom:author>, <refreshMode>, <refreshInterval>, <viewRefreshMode>, <flyToView>, <viewBoundScale>, <ItemIcon>, <Model>, <bgColor>, <maxSnippetLines>, <StyleMap><Pair><key>highlight, <TimeSpan>, <TimeStamp>, <NetworkLinkControl>, <LookAt>, <Camera>, <Metadata>, <Region>, <extrude>, <tessellate>, <altitudeMode>, Elements that currently use the gx prefix, <BalloonStyle>, <PhotoOverlay>

Graphic rendering


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