Google Maps Hd Satellite

[Jeanett Fite]

Livesatellite imagery is updated every 10 minutes from NOAA GOES, JMA Himawari, and KAI Geo-KOMPSAT geostationary satellites. EUMETSAT Meteosat imagery is updated every 15 minutes. Blue clouds at night represent fog and low-lying clouds. City lights at night are not live.

The inner workings of map types within the Maps JavaScript API is an advanced topic. Most developers can use the basic map types noted below. However, you can also modify the presentation of existing map types using Styled Maps or define your own map tiles using custom map types. When providing custom map types, you will need to understand how to modify the map's Map Type Registry.

You modify the map type in use by the Map by setting its mapTypeId property, either within the constructor via setting its Map options object, or by calling the map's setMapTypeId() method. The mapTypeID property defaults to roadmap.

Note that you don't actually set the map's map type directly, but instead set its mapTypeId to reference a MapType using an identifier. The Maps JavaScript API uses a map type registry, explained below, to manage these references.

The Maps JavaScript API supports special 45 imagery for certain locations. This high-resolution imagery provides perspective views towards each of the cardinal direction (North, South, East, West). These images are available at higher zoom levels for supported map types.

The satellite and hybrid map types support 45 imagery at high zoom levels (12 and greater) where available. If the user zooms into a location for which such imagery exists, these map types automatically alter their views in the following manner:

You can disable 45 imagery by calling setTilt(0) on the Map object. To enable 45 imagery for supported map types, call setTilt(45). The Map's getTilt() method will always reflect the current tilt being shown on the map; if you set a tilt on a map and then later remove that tilt (by zooming the map out, for example), the map's getTilt() method will return 0.

The 45 imagery actually consists of a collection of images for each cardinal direction (North, South, East, West). Once your map is displaying 45 imagery, you can orient the imagery towards one of its cardinal directions by calling setHeading() on the Map object, passing a number value expressed as degrees from North.

A map's mapTypeId is a string identifier that is used to associate a MapType with a unique value. Each Map object maintains a MapTypeRegistry which contains the collection of available MapTypes for that map. This registry is used to select the types of maps which are available in the Map's MapType control, for example.

You do not read directly from the map type registry. Instead, you modify the registry by adding custom map types and associating them with a string identifier of your choosing. You cannot modify or alter the basic map types (though you can remove them from the map by altering the appearance of the map's associated mapTypeControlOptions).

The following code sets the map to show only two map types in the map's mapTypeControlOptions and modifies the registry to add the association with this identifier to the actual implementation of the MapType interface.

The StyledMapType allows you to customize the presentation of the standard Google base maps, changing the visual display of such elements as roads, parks, and built-up areas to reflect a different style than that used in the default map type.

Each of these options relies on creating a class that implements the MapType interface. Additionally, the ImageMapType class provides some built-in behavior to simplify the creation of imagery map types.

Before you create classes which implement MapType, it is important to understand how Google Maps determines coordinates and decides which parts of the map to show. You need to implement similar logic for any base or overlay map types. Read the guide to map and tile coordinates.

Custom map types must implement the MapType interface. This interface specifies certain properties and methods that allow the API to initiate requests to your map type(s) when the API determines that it needs to display map tiles within the current viewport and zoom level. You handle these requests to decide which tile to load.

The API determines whether it needs to call getTile() based on the MapType's tileSize, minZoom, and maxZoom properties and the map's current viewport and zoom level. The handler for this method should return an HTML element given a passed coordinate, zoom level, and DOM element on which to append the tile image.

You typically should handle removal of any elements that were attached to the map tiles upon addition to the map. For example, if you attached event listeners to map tile overlays, you should remove them here.

Map types which you construct in this manner may either stand alone or be combined with other map types as overlays. Standalone map types are known as base map types. You may wish to have the API treat such custom MapTypes as it would any other existing base map type (ROADMAP, TERRAIN, etc.). To do so, add your custom MapType to the Map's mapTypes property. This property is of type MapTypeRegistry.

In these cases, you do not want the map type treated as a separate entity but as an overlay. You can do this by adding the map type to an existing MapType directly using the Map's overlayMapTypes property. This property contains an MVCArray of MapTypes. All map types (base and overlay) are rendered within the mapPane layer. Overlay map types will display on top of the base map they are attached to, in the order in which they appear in the Map.overlayMapTypes array (overlays with higher index values are displayed in front of overlays with lower index values).

Implementing a MapType to act as a base map type can be a time-consuming and laborious task. The API provides a special class that implements the MapType interface for the most common map types: map types that consist of tiles made up of single image files.

The following code implements a basic ImageMapType using Google's moon tiles. The example makes use of a normalization function to ensure that tiles repeat along the x-axis, but not along the y-axis of your map.

The Earth is a three-dimensional sphere (approximately), while a map is a flat two-dimensional surface. The map that you see within the Maps JavaScript API, like any flat map of the Earth, is a projection of that sphere onto a flat surface. In its simplest terms, a projection can be defined as a mapping of latitude/longitude values into coordinates on the projection's map.

Projections in the Maps JavaScript API must implement the Projection interface. A Projection implementation must provide not only a mapping from one coordinate system to another, but a bi-directional mapping. That is, you must define how to translate from Earth coordinates (LatLng objects) to the Projection class's world coordinate system, and vice versa. Google Maps uses the Mercator projection to create its maps from geographic data and convert events on the map into geographic coordinates. You can obtain this projection by calling getProjection() on the Map (or any of the standard base MapType types.) For most uses, this standard Projection will suffice, but you may also define and use your own custom projections.

Generally, you may use a projection for two cases: to create a map of the world, or to create a map of a local area. In the former case, you should ensure that your projection is also rectilinear and normal at all longitudes. Some projections (especially conic projections) may be "locally normal" (i.e. point north) but deviate from true north; for example, the further the map is positioned relative to some reference longitude. You may use such a projection locally, but be aware that the projection is necessarily imprecise and transformation errors will become increasingly apparently the further away from the reference longitude you deviate.

Projections are not only useful for determining the positions of locations or overlays, but for positioning the map tiles themselves. The Maps JavaScript API renders base maps using a MapType interface, which must declare both a projection property for identifying the map's projection and a getTile() method for retrieving map tiles based on tile coordinate values. Tile coordinates are based on both your basic tile size (which must be rectangular) and the "world size" of your map, which is the pixel size of your map world at zoom level 0. (For maps consisting of one tile at zoom 0, the tile size and world size are identical.)

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

A hotspot is a satellite image pixel with high infrared intensity, indicating a heat source. Hotspots from known industrial sources are removed; the remaining hotspots represent vegetation fires, which can be in forest, grass, cropland, or logging debris. A hotspot may represent one fire or be one of several hotspots representing a larger fire. Not all fires can be identified from satellite imagery, either because the fires are too small or because cloud cover obscures the satellite's view of the ground.

I have created a web map that includes publicly available Sentinel-2 infrared satellite imagery. In my web map the imagery displays as expected, though when I open it in field maps on both my iPhone and iPad, the infrared imagery is black and white. I'm yet to work out the reason why this is happening - any advice would be appreciated!

Sentinel 2 views use a template to display correctly in arcgis. My guess is that the field map app lacks the capability to recognize and display an image service layer the way it does in arcgis Pro or web maps. Try downloading and using the actual source imagery using the bands you want.

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