JP2004198530A5 - - Google Patents

Claims (9)

A map update program for executing a map update method in a map update system having a map storage means for storing a map figure and an image storage means for storing an aerial photograph image,
The map update method collates the map figure with the aerial photograph image captured after the map figure is created, and based on the collation of the map figure and the aerial photograph image, the structure in the aerial photograph image Judgment of changes in objects and whether or not the map figure representing the structure is “surviving”, “removal”, “extension / renovation”, “new construction”, and whether it has changed or not indicates that a field survey is required. A map update program characterized by assigning any attribute of “investigation” and displaying the map graphic of the structure on the map graphic according to the attribute. The map update system further includes structure feature data storage means for storing structure feature data in the map graphic,
The map update method uses a first coincidence calculated using the map graphic and a boundary image extracted from the aerial photograph image, the structure feature data, and an image feature extracted from the aerial photograph image. The map update program according to claim 1, wherein the collation is performed using a second degree of coincidence calculated as described above.   In the map update method, an attribute of “extension / renovation” or “removal” is given to a map figure in which at least one of the two matching degrees is less than a predetermined threshold, and both of the two matching degrees are predetermined. When the “survival” attribute is given to the map graphic that is equal to or greater than the threshold value and the structure feature data cannot be extracted and the first matching degree is less than a predetermined threshold value, An attribute of “requires investigation” is given to the map figure, and the structure figure data cannot be extracted and the map figure is displayed when the first matching degree is equal to or greater than a predetermined threshold. The attribute of “survival” is given to the map figure after the attributes of “extension / renovation”, “removal”, “survival”, and “requires investigation” are added, but they are present in the aerial photo image. To detect the structure to be Map updating program according to claim 1 or 2, characterized in that Azukasuru.   The map update method is based on the image shape of the structure in the aerial photo image when the attributes of the “extension / renovation”, “new construction”, and “required investigation” are given to the structure in the map figure. A map update program according to any one of claims 1 to 3, wherein a new map figure is created and the created map figure is displayed.   5. The map update program according to claim 4, wherein the map graphic is created by generating a map graphic representing the structure by scaling the image shape of the upper part of the structure and projecting it onto the ground.   The map figure is created when a part of the structure in the aerial photograph image is concealed by a natural object such as a shadow of another structure or a tree, within the range where the structure can be confirmed. The map update program according to claim 4, wherein a map is generated and a map figure of the structure is complemented by using a map figure that is collated with the structure for a part that cannot be confirmed.   When the above-mentioned map update method assigns the attributes “extended and renovated” and “requires investigation”, it indicates that the map figure used for the verification is a past, “extended and renovated: past” and “ Assign “required: past” attributes to each newly created map figure, and indicate “renovation: present” and “required: present” attributes, 7. The map update program according to claim 1, wherein the display means displays a map graphic having the past and current attributes.   2. The map update method according to claim 1, wherein a plurality of aerial photograph images photographed at different times and the map figure are collated, and an attribute to be given is determined by a majority process using the plurality of collation results. Map update program in any one of thru | or 7. Map storage means for storing map figures;
Image storage means for storing aerial photo images;
Structure feature data storage means for storing structure feature data in the map figure;
Boundary analysis means for calculating the degree of coincidence between the map graphic and the boundary image extracted from the aerial photograph image;
In-graphics image analysis means for calculating the degree of coincidence between the structure feature data and the image features extracted from the aerial photograph image;
A structure determination means for determining a change in the structure in the aerial photograph image from the two matching degrees;
Any of the “required investigation” that indicates “necessary”, “removal”, “extension / renovation”, “new construction”, and whether or not the map figure representing the structure determined above requires a field survey. A structure display attribute adding means for assigning such an attribute,
A map updating apparatus, comprising: a display unit configured to display a map graphic of the structure according to the attribute on the map graphic.