The invention provides an electronic map caption tagging method and device; the tagging method comprises the following steps: obtaining attribute information of linear figures and map captions surrounding the linear figures in the electronic map, wherein the attribute information comprises map caption tagging positions and map caption outer wrapping frame parameters; converting the linear figure into one or more point symbols according to preset pixel values; according to the map caption attribute information and point symbol pixel values, obtaining tapping positions of the map caption when the map caption and the point symbols are not overlapped in the electronic map, and tagging the map captions according to the obtained tagging positions. The method converts the linear figure into point symbols, and the map caption and point symbols are not overlapped, thus fast avoiding the map caption from the linear figure. The method uses point symbol avoiding strategy to uniformly deploy the map captions on two sides of the linear figure; the method and device are simple, high in efficiency, thus improving mapping efficiency, and the map can be clearer and tidy.

Electronic map caption tagging method and device

The invention discloses an annotation method and device for Surpac measurement acceptance system data. The method comprises the following steps: acquiring linear data and scattered data in the Surpac measurement acceptance system data; setting a feature vector for each type of scattered data respectively according to the types of the scattered data, wherein the feature vectors comprise annotation starting point parameters, annotation height parameters and annotation angle parameters, and the annotation angle parameters in the feature vectors of each type of scattered data are different; determining the annotation directions of the scattered data respectively according to the feature vectors; and combining the scattered data of which the annotation directions are determined with the linear data, and outputting a visual graph annotated with the scattered data. According to the method, the feature vectors are set for each type of scattered data, and different types of scattered data can be distinguished as required, so that ordered annotation of the scattered data can be realized.

Annotation method and device for Surpac measurement acceptance system data

The embodiment of the invention provides a method of decomposing a loop polygon and a drawing device At least one simple polygon exists inside the loop polygon; all outer boundary points of the loop polygon form an outer ring; and all boundary points of each simple polygon form an inner ring The method comprises steps: coordinates of each extreme value of the outer ring are calculated; crossing points formed by a cutting line on the boundary of the inner ring after the inner ring is cut are acquired, the inner point of each inner ring is calculated according to each crossing point, and the inner point is the central point of two adjacent crossing points; on the basis of the inner points and the coordinates of the extreme values, a cutting polygon is built through adding auxiliary points, and the cutting polygon passes through all inner rings; Boolean operation is carried out on the cutting polygon and the loop polygon to decompose the loop polygon, and simple polygons are obtained Human participation is not needed when the algorithm is adopted for decomposing the loop polygon, the entire process is automatically processed, the operation is simple, and as the Boolean operation is adopted for decomposing, the number of simple polygons formed after the loop polygon is cut is greatly reduced

Method of decomposing loop polygon and drawing device

The invention relates to an information labeling method and device, and belongs to the field of geographic information labeling, in particular to an information labeling method and device capable of automatically adapting to a geometric surface. The information labeling method comprises the following steps: a grid dividing step of dividing the minimal exterior rectangle of to-be-labeled geometricsurface into a plurality of grids; a grid labeling step of adopting different codes to separately label grids crossed with the geometric surface and grids not crossed with the geometric surface; a grid corroding step of scanning the grids and labeling a boundary grid of at least one un-crossed grid in the adjacent grids as an un-crossed grid until the quantity of the residual crossed grids meets athreshold value; and a position determining step of taking the residual crossed grids as final landmark positions. Therefore, the information labeling method has the advantages that: difference between computer vision and vision of people is reduced, so that expression of geometric information is more accurate and beautiful, and visual vision experience is improved, and therefore, the informationlabeling method is a labeling information placing method capable of adapting to the geometric surface.

Information labeling method and device capable of automatically adapting to geometric surface

The invention provides a method and a device for marking a map annotation. The method comprises steps: a preset map canvas range is mapped to a memory block; the area covered by a first terrain in the preset map canvas range is marked in the memory block; one preset position which is not marked in the corresponding position in the memory block is selected from multiple preset positions of a target annotation in need of marking, wherein the target annotation is a map annotation for representing a second terrain, and the second terrain is another terrain except the first terrain in the preset map canvas range; and the target annotation is marked in the marking position. According to the scheme of the invention, the map display canvas range is mapped to the memory block, whether the map annotation is conflicted with the terrain drawing position is judged through the marking of the corresponding position in the memory block, and on the premise of ensuring the drawing precision, the annotation coverage decision algorithm is simplified, and the program operation efficiency is improved.

Method and device for marking map annotation

The invention discloses map annotation method and device by means of a conflict detection mechanism and aims to solve the problem that map annotation is low in efficiency in the prior art. The map annotation method includes: adopting a gift wrapping algorithm to calculate the minimum outer-packaging convex polygon of a map label to be annotated; calculating the minimum enclosing rectangle of each outer-packaging convex polygons; building a spatial index tree by utilizing the minimum outer-packaging rectangles of all elements of a map as root nodes and the minimum enclosing rectangles as leaf nodes; sequentially inquiring other enclosing rectangles intersected with each enclosing rectangle in the spatial index tree, annotating corresponding map labels in the enclosing rectangles not intersected with other enclosing rectangles; judging whether the outer-packaging convex polygons in the intersected outer-packaging rectangles are intersected or not when the enclosing rectangles are intersected with other enclosing rectangles; if yes, annotating the corresponding map labels in the outer-packaging convex polygons not intersected, and if not, annotating a map label corresponding to one of the outer-packaging convex polygons in the intersected outer-packaging convex polygons. By the map annotation method and device, map annotating efficiency is improved.

Ma Ting

Papers

Map annotation method and device by means of conflict detection mechanism