Stereo map

Disponible avec une licence Image Analyst.

A stereo map is a stereoscopy-enabled map that provides stereo vision through a stereo model, which is composed of two images of the same geographic area taken from two locations. Binocular stereo vision facilitates better image interpretation than singular mono vision. With stereo display, you can perceive 3D depth, such as slopes and topography, complex building structures, and feature heights and elevation, and you can collect 3D features from the stereo images in the ArcGIS Pro stereo map.

A stereo map's data source is a stereo model consisting of a stereo image pair or a collection of stereo models managed as a mosaic dataset. The stereo mosaic dataset is created as a workspace in the Ortho Mapping application and must be block adjusted to derive the stereo model.

The stereo map uses the left and right images in the stereo model to establish the stereo display. ArcGIS Pro supports two types of stereo display using anaglyph red and cyan glasses or active shutter eyewear. For the shutter eyewear requirements, see Shutter glasses requirements.

Stereo Map view with anaglyph stereo pair and Stereo Model Selector pane are shown.

A stereo map has a projection that is defined by the current stereo model. The spatial reference of the map cannot be changed, but the stereo map can display the supported layer in any projection. If the layers have a different coordinate system than the stereo map, they are projected on the fly to the spatial reference of the stereo map. The best practice is to avoid reprojection when possible.

When a stereo pair is loaded, the Stereo Map view displays two images where the epipolar lines are parallel to the x-axis. The stereo cursor always returns to x, y, and z, which are displayed in the stereo view status in current projection units. If no vertical datum is defined, the z-unit will be the same as that defined in the mosaic dataset.

Stereo Map tab

The Stereo Map tab contains several groups: Clipboard, Navigate, Stereo Source, Layer, Stereo Display, Stereo Model, Cursor Type, Subviews, and Inquiry.

The Clipboard, Navigate, and Layer groups are duplicated from the map view. The Inquiry group contains the Locate and Measure tools. The other groups are unique to the stereo workflow.

Stereo Source group

The Stereo Source group has a split button to set and clear the stereo source. When a stereo map is initiated, you need to identify the data source for the stereo project. The Set Source button allows you to choose which stereo images to use in your project. You can choose a mosaic dataset or an image pair. When the stereo source is loaded, the first stereo pair of the mosaic data is used by default. Once you choose your stereo source, you can use the various stereo tools on the source images and perform your stereo workflow.

A stereo map can only have one stereo source. If the stereo map already has a stereo source defined, the new stereo source will replace the previous stereo source. If the source mosaic dataset does not have a stereo model built, the system gives you a warning message to build a stereo model before it can be used as a stereo source. When you use two images as your stereo source, ArcGIS Pro checks the files for rational polynomial coefficients (RPCs), frame camera models, and overlap between the two images. If any of the necessary requirements are missing, you are notified.

When you are finished using the current stereo source and you want to remove it from the stereo map, use the Clear Source button in the menu below Set Source .

Stereo Display group

The Stereo Display group has tools to set up your selected image pairs for your stereo workflow. The Display Mode has a drop-down menu to choose how to display your stereo pairs. The Default option displays both images. If you only want to see the left or the right image, click the Left Image Only button or the Right Image Only button , respectively. Click None if you do not want to display either of the stereo images.

If your stereo pairs are in the wrong order and you want to swap the left and right images, you can click Invert .

Display Stretch opens the Stereo Model Symbology pane, allowing you to adjust the image display setting for the left and right images. You can adjust the brightness, contrast, and gamma for each image. Additionally, you can adjust symbology settings such as band combination, contrast stretch, and dynamic range adjustment. If the settings for both the left and the right images are the same, you can check the Use same settings for both images check box and then make your display adjustments for both images simultaneously.

Zoom to Stereo Model updates the map display with the chosen stereo pair. This is helpful when you are exploring the map and you want to return focus to the extent of the stereo pairs.

The Resolution drop-down list allows you to set the display scale based on a factor of the current stereo model's resolution. These resolution choices help you work at the same level of detail for all your stereo models.

Stereo Model group

The stereo model collection can include many stereo pairs. The Stereo Model group has the tools to choose the stereo pair you want to work with in the stereo source. The Stereo Model Selector button opens the Stereo Model Selector pane, which allows you to manage and select stereo pairs to work with. The top of this pane displays the footprints of all the stereo pairs in your stereo source. The bottom of the pane lists all the available stereo pairs, which can be filtered by polygon, map extent, or attribute. For more information about the Stereo Model Selector pane, see Stereo Model Selector pane.

The other tools in the Stereo Model group give you different ways to choose which stereo pair to work with. Best Stereo Model displays the most appropriate stereo pair based on your location in the map display and the stereo model metadata. Next Stereo Model displays the next stereo pair in the stereo model based on the current sorting order. Conversely, Previous Stereo Model displays the previous stereo pair in the stereo model based on the current sorting order. Undo Stereo Model goes back to the previous stereo pair that was displayed in the map. Redo Stereo Model shows the next stereo pair that you were working with in the stereo map.

Cursor group

The tools in the Cursor group help you pick the right cursor shape, size, and color for your data. They also allow you to set the cursor z-sensitivity.

Cursor type

There are seven cursor shapes from which you can choose:

• Box Dot
• Circle Dot
• Cross Dot
• Cross Only
• Dot
• X Dot
• X Only

Each cursor shape has its advantages and disadvantages, but it is mainly a personal preference as to which one to use.

Cursor size and color

You can select the color and size of the cursor to increase its visibility in the stereo view. If you use the cyan/red anaglyph view, some colors show the height of the cursor better than others.

Cursor sensitivity

The cursor sensitivity page allows you to determine how much the z-value changes per scroll of the mouse wheel. The default value is the value set by the system based on data characteristics. It also allows you to set how the accelerator (Shift key) and decelerator (Caps Lock key) shortcuts will affect the change in z per scroll.

The application default values for cursor sensitivity are configurable on the Navigation Options page.

Sub Views group

The Sub Views group has tools to help you view stereo imagery in the following windows:

• Overview
• Magnifier

The Overview window shows the zoomed-out location of your current extent. This can help you navigate around the stereo pairs in your project without leaving your current stereo display resolution. The Magnifier window shows a zoomed-in view of the location of your cursor. This can help you view an object closely, without having to leave your current stereo display resolution.

Stereo map navigation

In the Stereo Map view, you can change the cursor's location by moving it to the desired x,y location. To change the z-location (height), you can rotate the mouse wheel to change the cursor's z-value. Click the left mouse button to enter the current 3D point.

You can use the standard Pan and Zoom tools to navigate around your stereo map. The multiple predefined pixel resolution scales allow you to navigate to the desired display scale. The 1 : Square root of 2 scale is often an optimal scale for stereo display clarity.

Sometimes you will need to adjust the x-parallax to see the features clearly, or if you want to zoom in to or out from features. You can also adjust the y-parallax if the adjustment accuracy of the stereo model is limited.

The following table lists the navigation keys used to manipulate the cursor and the display:

Raccourcis clavier pour la navigation cartographique stéréo

Raccourci clavier	Opération	Commentaire
Ctrl+Alt+S	Activez l’outil Select (Sélectionner).
Ctrl+Alt+C	Activez l’outil Explore (Explorer).
Cliquer et faire glisser	Permet de déplacer la carte.
Translation	Modification accélérée en x,y.	Déplacer le pointeur dans la direction voulue. Appuyez de nouveau sur Maj pour revenir à la vitesse de modification standard dans la direction x,y.
Verr Maj	Modification décélérée en x,y.	Déplacer le pointeur dans la direction voulue. Appuyez de nouveau sur Verr Maj pour revenir à la vitesse de modification standard dans la direction x,y.
Q	Défilement.	Déplacer le pointeur dans la direction voulue.
Signe plus (+) ou Ctrl+Molette de défilement	Permet d’appliquer un zoom avant.	Appliquer un zoom avant sur la carte.
Signe moins (-) ou Ctrl+Molette de défilement	Appliquez un zoom arrière.	Appliquer un zoom arrière sur la carte.
Z+déplacer le curseur horizontalement ou Z+Molette de défilement	Modifier la valeur z.	Pour augmenter la valeur z, faites tourner la molette vers l’arrière ou appuyez sur Z tout en faisant glisser le pointeur vers la droite. Pour réduire la valeur z, faites tourner la molette vers l’avant ou appuyez sur Z tout en faisant glisser le pointeur vers la gauche.
Maj+Z+déplacer le curseur horizontalement ou Maj+Molette de défilement	Modification accélérée en z.	Appuyez sur Maj tout en faisant tourner la molette de défilement. Pour modifier la valeur z 15 fois plus vite, vous pouvez également appuyer sur Maj+Z tout en déplaçant le pointeur vers la gauche ou la droite.
Verr Maj+Z+déplacer le curseur horizontalement ou Verr Maj+Molette de défilement	Modification décélérée en z.	Appuyez sur Verr Maj tout en faisant tourner la molette de défilement. Pour modifier la valeur z 5 fois plus lentement, vous pouvez également appuyer sur Verr Maj, puis sur Z, tout en déplaçant le pointeur vers la gauche ou la droite.
B	Activer ou désactiver la capture de surface.	La capture de surface permet de positionner à la demande la marque flottante sur la surface d’altitude à l’emplacement actuel du curseur stéréo. Cela permet d’obtenir la valeur z à l’emplacement du curseur stéréo. Cette entité nécessite que les statistiques soient calculées pour les images et que les pyramides soient construites avec un rééchantillonnage bilinéaire ou cubique.
T	Activer ou désactiver le terrain suivant.	La fonction de terrain suivant permet de laisser automatiquement le curseur stéréo sur la surface d’altitude lorsque vous déplacez la paire d’images stéréo. Cette fonction est utile pour naviguer dans l’affichage stéréo Si vous utilisez une image très volumineuse avec une connexion de réseau à distance, il est déconseillé d’utiliser cette fonction, car l’extraction des informations correctes par le système peut prendre un temps considérable. Il est également déconseillé d’utiliser cette fonction en mode curseur fixe, notamment sur les images qui présentent des modifications de surface fréquentes et significatives, par exemple un MNS avec une densité de bâtiments importante. Cette entité nécessite que les statistiques soient calculées pour les images et que les pyramides soient construites avec un rééchantillonnage bilinéaire ou cubique.
F8	Passer du mode curseur itinérant au mode curseur fixe et inversement.
~	Désactiver temporairement le mode curseur fixe.	Le mode curseur fixe est désactivé pour vous permettre d’exécuter d’autres tâches. Pour revenir au mode curseur fixe, appuyez de nouveau sur ~. Remarque : Il n’est pas nécessaire d’appuyer sur la touche Maj. Ce raccourci s’applique aux claviers standard utilisés aux États-Unis. Le caractère figurant sur cette touche sur d’autres types de clavier peut être différent. Pour plus d’informations, vérifiez la touche avec laquelle le code de touche virtuelle VK_OEM_3 Microsoft est mappé sur votre clavier.
Ctrl+Flèche gauche ou Ctrl+Flèche droite, ou V+déplacer le curseur vers la gauche ou la droite.	Ajuster le parallaxe x.	Les deux images se rapprochent ou s’éloignent dans la direction x (horizontale).
Ctrl+Flèche vers le haut ou Ctrl+Flèche vers le bas	Ajuster le parallaxe y.	Les deux images se rapprochent ou s’éloignent dans la direction y (verticale).
Ctrl+F7	Revenir au parallaxe par défaut.
M	Définir la source comme le meilleur modèle.
E	Effectuer un déplacement vers le centre de la paire stéréo.
Ctrl+Maj+M	Ouvrez la fenêtre Modify Features (Modifier des entités).
Ctrl+Maj+C	Ouvrez la fenêtre Create Features (Créer des entités).
Ctrl+Maj+S	Ouvrez la fenêtre Stereo Model Selector (Sélecteur de modèle stéréo).
O	Ouvrir la fenêtre Overview (Aperçu).
O	Ouvrir la fenêtre Magnifier (Loupe).

For more keyboard shortcuts, see Keyboard shortcuts for navigation and Keyboard shortcuts for editing.

The Stereo Map view supports two cursor modes: a roaming cursor and a fixed cursor. A roaming cursor shows typical cursor behavior: when you move the mouse, the cursor moves. This is the default behavior. A fixed cursor stays in the center of the display, and the imagery roams in the direction you move the mouse. The fixed cursor is efficient when collecting features since it reduces the need to pan on the map. While in the fixed cursor mode, you can temporarily switch to the roaming cursor mode by pressing the F8 key.

Features in stereo map

Features can be added to the stereo map using the Add Data button or by dragging the file onto the map. Once added to the stereo view, features are overlaid on top of the stereo model that is being viewed and are clipped to the stereo model. A feature added to the map is visible only if a source has been set.

Stereo map properties

Access the stereo map properties by right-clicking the stereo map in the Contents pane and clicking Properties. The Stereo tab in the Map Properties: Stereo pane allows you to view source information about the images comprising the stereo model and set the orientation direction of the stereo models displayed in the stereo map.

Stereo source information

The stereo source information section shows you the source information about the images comprising the stereo model that is currently displayed in the stereo map. These images can be two images making up a stereo pair or two items in a collection of images. The type of information displayed includes the location of the data, name of the dataset, type of workspace, and the ID of the left and right images of the stereo pair.

Stereo model orientation

Stereo models are displayed in certain configurations due to the nature of stereoscopic viewing. The images are displayed with one image designated as the left image and the second image designated as the right image. Image collection flightlines are typically collected in an east-west or west-east direction, where north is up or down in the map, or a north-south or south-north direction, where north is left or right in the map. Consider both of these factors when orienting imagery for stereo viewing.

ArcGIS Pro allows you to choose the way stereo models are oriented when displayed in the stereo map. You can orient stereo models so that north is Up or Right, Up or Left, Down or Right, and Down and Left.