The navigation has the ground resolution according to the phantom (Ground Sample Distance, is called GSD) to be possible to amount to 10 centimeters to 40 centimeters different, regards the scale of the photograph, to decide with the scanning resolution. Executive Yuan Council of Agriculture (COA) Forestry Bureau farming and forestry air survey (hereafter refers to as agricultural navigation) every year to be engaged in work regularly and so on air survey charting and resources investigation, has photographed obtains the massive aviation phantom material, and provides the folk project plan to handle Shanghai to buy the use. The agricultural navigation rests on Taiwan area 1/5,000 photograph base map map sheet to carry on the north and south route plan, uses the RMKTOP 15/23 wide-angle aviation camera (focal distance approximately 15 centimeters), the photography scale of the photograph approximately 1/17,000, all carries on the scan from 93 year aviation phantom take 14μm the resolution, GSD approximately as 24 centimeters. A resolution higher phantom more has accuracy of regarding the preliminary interpretation is of help, therefore, this case uses the agricultural navigation quality rank is The non-cloud aviation phantom takes the phantom interpretation main body material. In addition, also matches the SPOT-5 satellite phantom with to set up a file the material as the subsidy.

The land utilization classification demarcation line, may because of various types vector diagram files, for example: The topographic diagram, the land plat, the metropolis count the painting, the forest region chart and the GIS data in chart form and so on carry on the conformity pretreatment, but refers to the data in chart form to be numerous, how uses the material the reference order as well as to pick up the land utilization classification demarcation line material, establishes the reference data in chart form conformity standard operational procedure, takes the classified base map compilation and the phantom number the reference.

The interpretation is according to the navigation telemetering phantom, observation terrain feature information and so on phantom shape, size, texture, distinguishes its category attribute technology, is a specialized information picks up the technology, the interpretation personnel must undergo the training, and by the actual work accumulation experience, promotes the interpretation gradually the accuracy. The interpretation method uses the phantom category may differentiate is two kinds: “the three-dimensional interpretation” and “the interpretation, the three-dimensional interpretation use stereo pair imagery matching suitable equipment (e.g. stereoscope, phantom workstation and so on) then carry on the stereoscopic vision likely only”, but only likely the interpretation only carries on the interpretation directly likely on the single sheet phantom or the orthogonal projection, the work execution phase should consider the phantom to obtain factor choice appropriate interpretation methods and so on origin, work geography position.

1. Three-dimensional interpretation: Seeks outside various phantoms center of projection the element of orientation, then the reorganization the three-dimensional model namely forms the connection with the space coordinates system, may by the model in direct geometry information and so on gauging, inspection three dimensional spot, line, surface, has substantive being of help regarding the land utilization classification demarcation line precision's promotion.
2. Only likely interpretation: The interpretation (said likely only plane interpretation) is carries on the observation likely using the single sheet navigation according to the phantom or the orthogonal projection, the interpretation stereoscopic effect limited, may supply the judgment information likely only to be few, is created the elevation difference displacement the camouflage to affect easily, in addition must pay attention after the interpretation achievement extension draws how to maintain the original precision. If after using the orthogonal projection to appraise the geometry corrects, the operational accuracy properly likely.
3. The interpretation personnel train: Has personnel of the air survey three-dimensional charting experience, had the foundation concept regarding the navigation according to the phantom interpretation, for example various types building, road, railroad, airport, harbor, school, facility, partial farm crops and so on. However in view of this caseⅢThe level reaches 102 types to leave, this company has handled the work by the interpretation expert to lecture and study, the goal lies in makes the interpretation personnel to understand “the land use taxonomy” truly various categories implication as well as the important classified principle, the unification judgment standard, the promotion office work efficiency. All land utilization attribute material finally will carry on the investigation by the field operation personnel, achievement of the field operation also after the investigation the back coupling for the office work interpretation personnel, the revision interpretation experience, and will raise the interpretation accuracy as far as possible.
4. Basis of the phantom interpretation: The phantom interpretation the basic factor has the shape, the size, the tone and the color, the organization, the arrangement, the shadow, vertical with factors and so on object relevance. When interpretation, the minority category may sentences immediately on above one item or several items recognizes the object, but mostly needs to rest on many item of material to only then be able the correct decision object.

Because the land utilization classification must reachⅢWhen level altogether 103 kinds, field operation personnel spot investigation land use classification, should depend on certain principle judgment control, avoids judging the standard difference to create situation of the material mutual contradiction. Must handle the work regarding the investigators to lecture and study regularly, to teach that the land use classification principle, the time causes the field operation to judge the standardization, regarding possibly has the judgment doubt and so on to leave, draws up the determination order of priority, enables the investigators to have the full understanding regarding the work content, the investigation quality may control effectively.

When carries out the metropolis compact district field operation work, because building packed side by side in rows, between the building does not have the gap nearly, when field operation work photography, is asks the photograph to have broad covering, may in the path another one side photography, and the lens slightly, so may the racket suppose in a photograph several between buildings; Or pats the way by the company to photograph completely street one side, so may increase the investigation work photograph speed effectively, reduces the investigation bureau to cost the time. But between various photographs the overlap section may also have multiple perspectives of the building, for office work interpretation use.

Regarding is unable the interpretation for the office work to verify position of the classified attribute, the field operation must handle the investigation, but the route passes by various earthen mounds block attribute to attribute of cross check with the base map remark. When on-the-spot investigation, investigates on the base map to investigate the obtained land utilization present situation, according to land classification systemⅢAbbreviation of the level classification, according to the following method remark:

1. Position of the request investigation must by several camera photographs, and on the plan the remark photography serial number and the position (photography direction), the photography serial number should with the phantom serial number correspondence, by facilitate the comparison control.
2. Because the plan position is limited, the investigation base map indication photography serial number, simultaneously will then photograph serial number filling in the investigation log sheet, besides classifies the attribute, deals makes the detailed description in present situation (e.g.: Advertisement name).
3. Investigates on the base map the use area remark and on the spot using present situation match case, should in the remark “ˇ”.
4. Investigates on the base map use of area the remark completely and on the spot using present situation not symbol, should the original remark lineation, another heartily use present situation give the remark.
5. Investigates on the base map in the identical use area the partial present situations with when does not tally on the spot, should this land Qiu Kuaiyu investigate on the base map the picture to record the correct classified demarcation line, actual situation filling in the investigation log sheet, and photographs the scene pictorial record.
6. In case present situation does not understand is unable to confirm that place of the classified attribute, may inquire of the local populace in the scene take the oral way (to verify good in every way as); Except the photograph beside, will simultaneously inquire of situation filling in the investigation log sheet, will supply in the future verification.
7. Does not understand regarding present situation is unable to confirm place of the classified attribute, and the being unable populace may supply to inquire, except the photograph beside, should do the actual present situation in the investigation log sheet the detailed description, will supply in the future verification.
8. Several camera photography work, must is clear the land cover or the land utilization present situation photography, for example: Investigation content for building when must the building advertisement, the outward appearance photograph completely, so that the office work can edit time the work reexamines the confirmation; Simultaneously must peripheral sentence advantageously knows the information one and photographs, and take photographs the way good continuously as.

According to field operation back achievements and the photography photograph content and so on investigation of schematic diagram, investigation log sheet, handles office work Cheng Tu to edit the work, the operating type and the base map manufacture way is the same. Before the attribute correction, must confirm photography photograph and field operation remark match case, building with land cover outward appearance after photograph consistent only then confirms this land use content. The photography content or like has with the investigation log sheet does not tally the condition, or has the photograph not clear and possibility of the miscarriage of justice, in addition by the obvious color firefly light pen indication, returns the field operation to handle the duplicate accent.

The GIS achievement conformity work is carries on the GIS achievement conformity work by the software tool, besides regards the work demand to compile the great collection language assistance data processing, and develops voluntarily provides the file format conversion as well as the achievement quality control needs the application program. The overall work flow may differentiate is “the interpretation achievement conformity”, “the GIS graph and the attribute material control”, “the statistical returns manufacture”, “the annotation material establishes the plan” and so on 4 prime task projects.

1. Interpretation achievement conformity: The coordinate specification demand, the interpretation achievement needs the conformity to supply the following Canadian value application to the GIS information bank. The work step contains “the GIS file to transform”, “attribute column processing”, “the interpretation operating type column (METHOD) the value computation”, “Qiu Kuaizheng and”, “the chart of symbols hypothesis”, “the chart” and “the format conversion” and so on a project.
   
2. GIS graph and attribute material control: After giving the achievement file earthen mound block classification color, may assist the artificial work to distinguish “the graph (line segment) is not continual” or “the attribute not continuously (unreasonable)” question. Does by the GIS software for the graph control tool, because of the artificial work overall check achievement chart level, in view of wrong or has the doubt region to carry on the mark by the polygon primitive, this polygon chart level is “awaits repairs subscribes the scope”, the base map manufacture and the interpretation operating personnel may carry on the chart files because of the telescope this polygon scope to edit once more. Moreover, after program automation control, but filters the attribute material to present the common mistake effectively, for example the attribute column name mistake, the column content format error, the column content for the spatial value and so on, and check the result based on the program to revise to the attribute material.
3. Statistical returns manufacture: Establishes in the national territory after the GIS information bank completes, the synchronized manufacture statistical returns will enable this case achievement to provide more Yuan following applications, the promotion overall material value. The statistical returns achievement altogether seven broad headings, depend on the statistical object discrimination separately for various counties city, metropolis types and so on use zoning, non-metropolis area and various operation areas, manufactured has contained the classified attribute area, the achievement to produce statistical data and so on system way area.
4. The annotation material establishes the plan: The annotation material standard (TWSMP) the content contains the recognition material, the limit material, the material quality information, the spatial demonstration information, the supply material, the scope material, the maintenance material, the cite data, the reference system and other information and so on 10 big projects.