Photomap

as a kind of map that integrates the map with the remote sensing image

has the advantages of both images and Line symbol maps and is the composite of multi-source spatial data.As a formation of map product

image-rich detailed photomap can provide fast and practical geographic information for many industries and communities

and direct its current and potential application in fields such as urban planning

infrastructure construction

disaster prevention and mitigation

environmental protection

agricultural planning

information management and national defense.Therefore

it is essential geospatial information.The Wenchuan photomap productions need to use the photogrammetric information of the earthquake-stricken area and high-resolution satellite remote sensing images.Using the photogrammetry and remote sensing technology

it needs to rapidly produce the orthoimages of the disaster areas

and moderately overlay 1:50000 core elements of the earthquake-stricken area to form sub-county wall photomaps

the region-wide photomaps of 1:25

000-scale and the urban and regional focus photomaps of 1:5000-scale.It can provide geographic information services in a timely manner for post-disaster damage assessment

disaster monitoring and survey

planning

and post-disaster reconstruction work.During the period of disaster emergency

according to the "producing as well as the application" principle

in only a month it has completed the production of 98 county photomaps of the 95 counties of whole coverage

the 2653 photomaps of 1:25

000 scale covering 95 counties and the 2114 photomaps of 1:5000 scale of key areas.They are being provided to the affected areas and government departments

and has played an important role in the analysis of the disaster assessment

planning

and post-disaster reconstruction work.Comparing with traditional types of ordinary maps

thematic maps and the comprehensive maps

photomap has not only the features of the traditional map

using the computer graphics technology

but also a large number of remote sensing image processing technology.It has a new production requirement for the content structure

the means of expression and the production process.