1Product Introduction:

Realistic 3D model products can automatically generate high-resolution 3D models with realistic texture maps based on a series of 2D photos or a set of oblique images. Realistic photos contain coordinate information, and the geographic location information of the 3D model is also accurate. This 3D real-life model product has realistic effects, comprehensive elements, and measurement accuracy. It not only gives people a sense of immersion, but also can be used for surveying applications, which is a true reproduction of the real world.

IIProduct type and requirements

1Tilted 3D Realistic Model Product:

Tilt photography is a new technology that has gradually developed in the field of aerial surveying in recent years. Compared to traditional vertical photography data collected by aerial surveying, it obtains oblique images with a certain tilt angle by adding multiple lenses at different angles. By applying oblique photography technology, high-resolution images of multiple different angles at the same location can be obtained simultaneously, capturing rich information on the texture and location of ground objects. Based on detailed aerial survey data, a series of operations such as image preprocessing, regional joint adjustment, and multi view impact matching are carried out to establish high-quality and high-precision 3D GIS models in batches.

2. Traditional artificial 3D modeling products

a. Fine Model

⑴ Product requirements:Realistic and accurate representation of the appearance of buildings, with some very fine solid structures allowed to be ignored without affecting the authenticity and geometric structure of the building. These types of buildings are generally urban public buildings and buildings that require key modeling. Details within 0.2 meters can be ignored (except for structures that represent architectural features). Geometric structures such as three-dimensional roofs, concave convex balconies, and protruding lobbies on the first floor cannot be ignored and cannot be replaced by textures. They need to be represented by geometric entities. Roof textures require clarity and aesthetics, and can be represented using textures from non real material libraries.

⑵ Number of triangles: within 1500, number of pixels on one side of the texture: not greater than 1024, format: jpg (transparent texture requires DDS, PNG, or TGA format).

b. Standard Model

⑴ Product requirements: The main structure should be made based on the building height, width, length, images, and photos. The structure should be refined using methods such as editing polygons, and the texture should be edited using collected photos. The building structure is clear, with small pieces (1-2 boxes) on the roof. Details within 0.5 meters can be ignored (except for structures that represent architectural features). There are simple stair steps and rain shelters. The volume relationship is correct, the texture is clear and clean, and there should be no obvious perspective. The texture of the roof and building can be repeated. Tile the texture seamlessly. The texture is realistic and layered, and the parapet wall may be painted or directly created.

⑵ Number of triangles: within 500, number of pixels on one side of the texture: not greater than 512, format: jpg (transparent texture requires DDS, PNG, or TGA format)

c. Simple model

⑴ Product requirements: Based on the building height, width, length, images, and photos, create the main structure, refine the structure using polygon editing and other methods, and use collected photos to create texture maps. The overall and large surface structure is clear, and details within 1 meter can be ignored (except for structures that express architectural features). The rooftop should have small pieces with clear and clean textures, without obvious perspective. Tile the texture seamlessly. The texture is realistic and layered.

⑵ Number of triangles: within 150, number of pixels on one side of the texture: not greater than 256, format: jpg (transparent texture requires DDS, PNG, or TGA format)

d. Block model

The model data is automatically generated based on the floor height and number of floors using two-dimensional vector information. The characteristic of this data is that the data generation speed is very fast. But due to the fixed floor height, the height is not very accurate. The appearance of the model is a unified texture, which can only express the types and general volume relationships of the buildings. It is more suitable for expressing architectural complexes with very high density and a single type.

3. Indoor artificial 3D model products

1. Standard indoor building production, with a small building area and a certain regularity in structure, for small buildings such as offices, housing, and small villas

2. Standard indoor building production, with a large building area, charged based on square meters (for large buildings such as venues, theaters, hotels, etc.).

4. 3D modeling products for community engineering projects such as factory areas and substations

a、 Fine factory area

Product requirements: Realistic and accurate representation of the appearance of buildings (equipment). On the basis of not affecting the authenticity and geometric structure of buildings (equipment), some fine solid structures within 0.5 meters are allowed to be ignored (except for structures that represent the characteristics of buildings or equipment). The main structure cannot be replaced by textures and needs to be represented by geometric entities; The main external pipelines and pipeline connections should be made with clear and beautiful textures, which can be represented using textures from non real material libraries; The ground model is constructed based on the image, with texture maps that are realistic, clear, and aesthetically pleasing.

b、 Fine 3D modeling products for engineering projects such as substations

Product requirements: In station transformers, gantry frames, towers, current transformers, isolation switches, transformers, circuit breakers, capacitors, busbars, connecting lines, voltage transformers, reactors, lightning arresters, GIS composite appliances, status monitoring equipment, secondary screen cabinets, switchgear, grounding switches; The above electrical equipment ancillary infrastructure, station roads, buildings, courtyard walls, etc; Each device only builds external contours and texture maps. The internal structure of the device is not modeled; The main external key constructions of the equipment need to be modeled, such as equipment screws.