CN104361002A - Method and device for configuring fixed spotty thematic symbols on network map - Google Patents
Method and device for configuring fixed spotty thematic symbols on network map Download PDFInfo
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Abstract
The invention discloses a method and a device for configuring fixed spotty thematic symbols on a network map. The method comprises the following steps: calculating load of thematic symbol information on the network map, and according to the load of the thematic symbol information on the network map and the suitability index parameters, judging whether the thematic symbol information on the network map is overload or not; if the thematic symbol information on the network map are judged to be overload, performing point cluster and simplification integration on locating points corresponding to the current thematic symbols; if one-step point cluster and simplification integration cannot meet the requirement, circulating repeatedly till the thematic symbol information on the network map are not overload; when the thematic symbol information on the network map are not overload, adjusting the sizes of the thematic symbols to avoid overlapping and covering phenomena of the thematic symbols, and meanwhile, amplifying thematic symbols of which the sizes are smaller than that identified by naked eyes; calculating the intersection condition of the thematic symbols and geographic base map elements after size adjustment, and judging whether the thematic symbols conflict with the geographic base map elements or not; if the thematic symbols conflict with geographic base map elements, performing the setting adjustment on the thematic symbols to avoid conflict.
Description
Technical field
The present invention relates to network map and technical field of spatial information service, particularly relate to a kind of network map fixed point thematic symbol collocation method and device.
Background technology
Online interaction formula map (Web Interactive Maps) is as a kind of map view in ubiquitous drawing epoch, have and obtain the feature such as facility, simple, the personalized drawing of making, while promotion map application develops to socialization, universalization, the professional of map and aesthetic property aspect is caused to present downward trend also.Such as, in the middle of existing online thematic maps, due to the not predictability of network thematic data, automatically the thematic symbol drawn out is easy to the situation occurring Steric clashes, show as to exist between contiguous thematic symbol and strive position, thematic symbol and important geographical base features and strive position etc., constrain the expression effect of map.For thematic symbol map of fixing a point, fixed point thematic symbol is a kind of common online thematic maps expression being expressed physical quantities and qualitative character by shape, color and size on map on the spot location point, comprise qualitative symbol, quantitatively symbol and composite symbol, easily occur the problem that symbol conflicts, Fig. 1 is shown in concrete manifestation.
Symbol space conflict reason has to cause network thematic maps to occur: 1) the map space information amount of loading with is excessive, in limited web map space, on the network map of quantity of information overload, the distribution of thematic symbol key element is too much, overstocked, then must cause between symbol and symbol overlap, gland, symbol layer overlapping with the key element in geographical base map layer (as Fig. 1 (a)); 2) in the normal situation of map space information loads, still likely cause because of the layout of adjacent-symbol and the unreasonable of size the situation (as Fig. 1 (b)) occurring gland between symbol, and at present, still lack a comparatively effective network thematic maps fixed point symbol collocation method and solve these problems.
Summary of the invention
For the technical matters of above-mentioned existence, the object of this invention is to provide a kind of network thematic maps fixed point symbol collocation method, with realize to network thematic maps fixed point symbol robotization, configure without symbol conflictization.
For achieving the above object, the present invention adopts following technical scheme: a kind of robotization collocation method of network map special topic fixed point symbol, comprises the following steps:
Thematic symbol information that computational grid map is fixed a point is loaded with, and loads with and adaptability target parameter according to the map fixed point thematic symbol information calculated, and judges map whether information overload;
If judge map fixed point thematic symbol information overload, then utilize point set abbreviation algorithm, it is comprehensive that the anchor point corresponding to current fixed-point thematic symbol carries out point group abbreviation; If a point group abbreviation comprehensively fails to reach requirement, then circulation is carried out repeatedly, until map fixed point thematic symbol information loads with nonoverload;
When map fixed point thematic symbol information nonoverload, then regulate fixed point thematic symbol size, make to avoid occurring overlapping and gland phenomenon between fixed point thematic symbol, meanwhile, amplification process is carried out for the fixed point thematic symbol being less than naked eyes identification size;
Calculate and regulate size postfixed point thematic symbol and the crossing situation of geographical base map key element, judge whether to there is fixed point thematic symbol and geographical base map conflict of feature;
If there is conflict, then adjustment is arranged, to avoid described conflict to fixed point thematic symbol.
A robotization inking device for network map fixed point thematic symbol, is characterized in that, comprising:
Load computing module, thematic symbol information of fixing a point on computational grid map is loaded with, and loads with and adaptability target parameter according to the map fixed point thematic symbol information calculated, and judges map whether information overload;
Point set abbreviation module, its fruit judges map fixed point thematic symbol information overload, then it utilizes point set abbreviation algorithm, and it is comprehensive that the anchor point corresponding to current fixed-point thematic symbol carries out point group abbreviation; If a point group abbreviation comprehensively fails to reach requirement, then circulation is carried out repeatedly, until map fixed point thematic symbol information loads with nonoverload;
Size adjustment module, when map fixed point thematic symbol information nonoverload, then it regulates fixed point thematic symbol size, makes to avoid occurring overlapping and gland phenomenon between fixed point thematic symbol, meanwhile, amplification process is carried out for the fixed point thematic symbol being less than naked eyes identification size;
Conflict judge module, regulating size postfixed point thematic symbol and the crossing situation of geographical base map key element for calculating, judging whether to there is fixed point thematic symbol and geographical base map conflict of feature;
Arrange adjustment module, if there is conflict, then it arranges adjustment, to avoid described conflict to fixed point thematic symbol.
The present invention has the following advantages and good effect:
1) Steric clashes such as non-bonnet (NB) between the network thematic maps fixed point symbol that the invention enables generation;
2) the present invention can need rationally to select the abbreviation degree of symbol and the grade classification yardstick of symbol dimension according to the drawing of network map.
Accompanying drawing explanation
Fig. 1 (a) ~ Fig. 1 (b) be respectively fix a point in network thematic maps symap occur Steric clashes illustrate schematic diagram.
Fig. 2 is network thematic maps fixed point symbol collocation method schematic flow sheet in the present invention.
Fig. 3 be without this method process before a width about the thematic maps of Shenzhen's commercial building statistical distribution.
Fig. 4 (a) is that after use this method positions symbol point group abbreviation to Fig. 2, the thematic maps design sketch obtained, Fig. 4 (b) is the partial enlarged drawing to Fig. 4 (a).
Fig. 5 (a) is that after the symbol dimension placement algorithm in use this method processes Fig. 4 symbol, the thematic maps design sketch obtained, Fig. 5 (b) is the partial enlarged drawing to Fig. 5 (a).
Fig. 6 be use the symbol in this method to superpose with base features when, the thematic maps regional area design sketch that transparent processing obtains is carried out to Fig. 5 symbol, Fig. 6 (a) be process before figure, Fig. 6 (b) be transparent processing after figure.
After Fig. 7 is through all treatment schemees of this method, the final thematic maps design sketch obtained.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
The invention provides a kind of network thematic maps fixed point symbol collocation method, the method is started with from control Map Information Volume, computing method, point group abbreviation algorithm is loaded with reference to existing map, and according to fixed point thematic symbol position topological relation, design fixed point thematic symbol size regulates algorithm, and then propose a kind of be directed to network map environment under to fix a point the method for thematic symbol configuration, there is fixed point thematic symbol collision problem to solve.
Fig. 2 shows the network thematic maps fixed point symbol collocation method process flow diagram that the present invention proposes.As shown in Figure 2, the method comprises:
Step 1: initiating task, calculates fixed point symbol thematic maps information and loads with, load with adaptability target parameter according to network map information, judges map whether information overload; If overload, then go to step 2, otherwise go to step 3; Wherein, described Leaf element contents parameter comprises the parameters such as fixed point thematic symbol number, topology distribution, symbol geometric shape, is for judging the threshold parameter whether map fixed point thematic symbol information transships; The present invention judges mainly through two indices parameter: under webpage scope, the fixed point thematic symbol number of unit screen area, and the fixed point thematic symbol area percentage of unit screen area;
Step 2: it is comprehensive to carry out point group when cartographic information loads with overload; In step 1 according to the current map spatial information amount of loading with calculated, contrast with the amount of loading with that is suitable for obtained, and judge whether it transships; If overload, then choose point set abbreviation algorithm in step 2, carry out comprehensively to current sign anchor point, in comprehensive process, main space distribution, the topological relation considering maintenance point group, also needs the size considering symbol itself simultaneously; After comprehensively completing, again return step 1, the map space information comprehensively that calculates is loaded with, if once comprehensively fail to reach requirement, then continue to perform step 2, circulation is carried out repeatedly comprehensive, loads with and reaches requirement, then enter step 3 when cartographic information;
Step 3: carry out fixed point thematic symbol size when cartographic information is loaded with up to standard and regulate, namely makes to avoid occurring overlapping and gland phenomenon between fixed point thematic symbol, meanwhile, carries out amplification process for the fixed point thematic symbol being less than naked eyes identification size.
In this step, when the current map spatial information amount of loading with is not transshipped, then start " the adjustment algorithm based on the fixed point thematic symbol size of Voronoi ", mainly through convergent-divergent symbol dimension, make the symbol dimension after regulating meet the requirement of fixed point thematic symbol size adaptability target parameter, avoid fixing a point between thematic symbol, to occur phenomenon that is overlapping and gland; It should be noted that when carrying out size adjustment, needing the smallest limit setting size, with the size avoiding the fixed point thematic symbol size after regulating to be less than naked eyes identification;
Step 4: calculate fixed point thematic symbol and the crossing situation of geographical base map important elements, judge whether that there is symbol conflicts with base features;
Step 5: if there is conflict, then adjustment is arranged to fixed point thematic symbol, namely according to above-mentioned result of calculation, if discovery symbol is overlapping with important elements or the situation of gland, that then carries out fixing a point thematic symbol arranges adjustment, as given up current sign or arranging symbol transparency to ensure the visual of important base features, arranges to regulate and completely obtains final thematic maps then terminated task, and the situation of if there is no overlapping or gland, then direct terminated task.
Network fixed point symbol thematic maps described in described step 1 load with calculating, calculate mainly through two indices parameter: under webpage scope, the fixed point thematic symbol number of unit screen area, and the fixed point thematic symbol area percentage of unit screen area.
According to the actual requirement of network thematic maps, location thematic maps spatial information loads with number, topology distribution, the symbol geometric shape that parameter mainly comprises symbol, on network thematic maps, the present invention introduces two indices: namely under webpage scope, the fixed point thematic symbol number of unit screen area, with the fixed point thematic symbol area percentage of unit screen area, its computing formula is respectively:
Pt＝Num/Area(Map)*Area(Unit) (1)
Per＝∑Area(Symbol)/Area(Map) (2)
In formula, Pt is the fixed point thematic symbol number of unit screen area, Num is total number of symbols, Area (Map) is screen map area, Area (Unit) is unit area, Per is fixed point thematic symbol area percentage, and Area (Symbol) is single fixed point thematic symbol area.
From to main network thematic maps website, several thematic positioning maps of random selecting, mainly choose the network fixed point size of thematic symbol, number, geometric area add up, wherein the size of symbol is the maximum cut-off footpath of symbol, symbol area is assumed to the area of the rectangle under this length, and unit area is set to 100px*100px.Obtaining least fixed-point thematic symbol on webpage by analysis of statistical results should not lower than 8px, unit area number of symbols is no more than 2 and is advisable, symbol area percentage is no more than 10% and is advisable, these index parameters are that the basic threshold value of transshipping and judging loaded with by the tentatively given map that carries out, and more suitable index parameter needs successive optimization in long-term interactive graphics to obtain.
In described step 2, the choice problem of network fixed point fixed point thematic symbol is converted into point group abbreviation problem, the i.e. corresponding fixed point thematic symbol of each anchor point, by existing point group synthesization contracted calculation, fixed point thematic symbol number is controlled, the requirement of above-mentioned two indices can be reached with network special topic fixed point symap after making abbreviation;
According to the requirement of hold mark overall space feature in thematic maps, main employing existing point group abbreviation algorithm, by carrying out comprehensively to the thematic map symbol anchor point of overload, retain important point, leave out secondary point, and then reach the fixed point thematic symbol retaining vital point, leave out the fixed point thematic symbol object of secondary point; According to the needs of drawing, suitable point group abbreviation algorithm can be selected, as used the point group abbreviation algorithm, point group aggregative weighted Voronoi algorithm etc. of taking space characteristics into account, then according to a upper trifle provide count, degree of integration that the index parameter such as symbol dimension, symbol area, geometry and topology determines final point group abbreviation, retain the fixed point thematic symbol of reasonable number.Wherein, the size of symbol dimension specified point thematic symbol, symbol area refers to the area at fixed point thematic symbol place on map, left and right.The degree of integration of described final point group abbreviation refers to the number of deleted secondary point bit sign.
" the fixed point thematic symbol size based on Voronoi regulates algorithm " mentioned in described step 3, a kind of according to fixed point thematic symbol anchor point, carry out topology constructing Voronoi figure, then according to Voronoi figure characteristic, calculate corresponding fixed point thematic symbol size, to ensure the algorithm fixing a point there is gland conflict between thematic symbol, wherein, the admissible full-size of thematic symbol of fixing a point under the fixed point thematic symbol size suitable parameter mentioned refers to current web page display environment and the distinguishable minimum dimension of naked eyes, it is an experimental parameter of drawing, thematic symbol of fixing a point within the scope of 1024*768 in network thematic maps is of a size of 8px ~ 60px, can finely tune according to drawing needs and display environment,
After determining that cartographic information is loaded with in suitable scope, regulate fixed point thematic symbol size Intelligent adjustment further.The symbol dimension based on Voronoi figure is provided to regulate algorithm, specific as follows:
If known thematic map symbol location point set Pn, wherein element is the coordinate position of symbol location point, as the x of two-dimensional space, y coordinate etc., corresponding thematic data Dn, mainly refers to that the statistic of thematic data is as 100 populations, 10000 yuan of per capita incomes etc., n is positive integer, and the step of algorithm is as follows:
Step 31: point set Pn is the loose set of two-dimensional space, can according to the general-purpose algorithm building Voronoi, and build the Voronoi set of graphs Vn that point set Pn is corresponding, V is divided into n region whole plane, comprises an anchor point Pi in each region; Wherein, an area of space Vi of the corresponding Voronoi figure of each anchor point Pi, it is made up of the Voronoi limit and Voronoi summit comprising Pi;
Step 32: calculate in the area of space that in Vi, each anchor point Pi is corresponding, take Pi as the maximum inscribed circle diameter in the center of circle, for the Vi region on map boundary line, the convex closure that the joining calculating itself and border is formed, the maximum inscribed circle diameter being the center of circle with anchor point Pi in calculating convex closure, the diameter result obtained by both of these case is designated as Rn and sorts, and is maximumly designated as Rmax, is minimumly designated as Rmin;
Step 33: calculate the thematic data of each anchor point and the inscribed circle diameter ratio (Dn/Rn) of each anchor point, be designated as Tn, Tn is sorted, maximal value is designated as Tmax, and record location point Pmax, minimum value is designated as Tmin, and record location point Pmin;
Step 34: set symbol dimension that each anchor point Pn is corresponding as Sn, the maximum symbol dimension that then Pmax point is corresponding is set to Smax, the minimum symbol dimension that Pmin point is corresponding is set to Smin, if it is L that current web page screen is suitable for minimum symbol dimension, maximum symbol dimension is H, (L and H is the preset parameter arranged according to screen display situation, and wherein minimum symbol dimension is the distinguishable minimum dimensions of naked eyes), then have relational expression as follows:
L≤Smin≤Smax≤H (3)
Therefore:
Smax＝Min(Rmax，H) (4)
Smin＝Max(Rmin，L) (5)
Step 35: all the other each point symbol dimension calculate according to thematic data hierarchical algorithms, for linear steps algorithm, Ti is arbitrfary point thematic data and inscribed circle diameter ratio, and the symbol dimension Si computing formula that arbitrfary point Pi is corresponding is as follows:
Mainly fixed point thematic symbol size regulated in this step, make fixed point thematic symbol full-size be no more than Voronoi figure border, minimum dimension is not less than the discernmible size of naked eyes;
The fixed point thematic symbol mentioned in described step 5 and base map basic factors adjustment is set, be a kind of control method according to priority rule between fixed point fixed point thematic symbol and base features.
After determining symbol dimension, by Polygon intersection compute location fixed point thematic symbol and the crossing situation between other map elements, can know that whether and exist between other map elements and strive bit swiping fixed point thematic symbol, if there is conflict, according to key element significance level: the principle of " basic factors > vector symbol > fixed point thematic symbol > marks and draws symbol " carries out reasonable arrangement, wherein basic factors comprise place name, the basic grating map key element such as zoning, vector symbol mainly refers to the vector element symbol issued, mark and draw symbol as the situation labelling added, fixed point thematic symbol mainly refers to the sprocket bit of the thematic statistics expressing quantitative information, such as pie, the symbols such as column, basic factors are mainly with boundary, river, the grid tile of the key elements such as settlement place, vector symbol is the basic factors that can edit, mark and draw some arrows of symbol, the indicative symbol such as loop graph, fixed point thematic symbol especially should be tried one's best and do not stopped that important foundation key element is as the key element such as place name, zoning, looks concrete condition in addition, can process as follows:
1. abandon fixed point thematic symbol, if base features importance degree is high, namely higher than fixed point thematic symbol, and key element hides by thematic symbol of fixing a point completely, then can not show this fixed point thematic symbol;
It is transparent that 2. fixed point thematic symbol is set, if base features importance is general, namely lower than fixed point thematic symbol, reaches visual, then transparency can be set to fixed point thematic symbol, ensure that base features is visible;
3. exchange symbol and key element show levels, if base features is place name mark etc. do not form geometry with surrounding geographic element, then key element can be positioned on fixed point thematic symbol.
With specific embodiment, the invention will be further described by reference to the accompanying drawings below:
As shown in Fig. 1 (a), this is that a kind of common number of symbols too much causes map symbol gland and map overload problem, as shown in Fig. 1 (b), this is the oversize problem causing symbol gland of a kind of special topic, is the problem that this algorithm will solve;
Below for Shenzhen's commercial building statistical Butut in 2008, this method is utilized to be configured it.
(1) as shown in Figure 3, according to statistics, the thematic maps information loads directly automatically generated is excessive, symbol conflict is comparatively serious, adding up its unit area number of symbols is 13.91, and symbol area percentage is about 20.03%, has exceeded thematic maps and has been suitable for loading with scope;
(2) as shown in Fig. 4 (a), on it, carry out comprehensively according to the algorithm taking partition characteristics into account, calculating its unit area number of symbols is 1.1, and the symbol area percentage moon is 6.89%, reach thematic maps and be suitable for loading range, but as seen from the figure, although map load obviously reduces, partial enlargement is carried out to map, as shown in Fig. 4 (b), between fixed point thematic symbol, still there is the situation of gland;
(3) as shown in Fig. 5 (a), then run symbol size and regulate algorithm, for above-mentioned algorithm, according to algorithm, maximum symbol diameter in figure can not exceed the scope of Voronoi figure, carry out size to the minimum symbol being less than naked eyes identification simultaneously and amplify process, Fig. 5 (b) is the partial enlargement to Fig. 5 (a);
(4) as Fig. 6 (a) shows, calculate fixed point thematic symbol situation crossing with geographical base map key element, find the important place name atural object key element of fixed point thematic symbol gland, accordingly transparency process is carried out to fixed point thematic symbol, still can clearly see base map atural object through symbol, after transparent processing, effect is as shown in Fig. 6 (b);
(5) as shown in Figure 7, complete all process, obtain final network thematic maps.
The invention enables the fixed point thematic map symbol level of on-line automatic generation obvious, non-bonnet (NB) between symbol, improve the effect of visualization of thematic map symbol, ensure that the message transmission capability of thematic map symbol, what fully meet the fixed point thematic maps of Online Map user uses figure demand, successful.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a robotization collocation method for network map fixed point thematic symbol, is characterized in that, comprise the following steps:
Thematic symbol information that computational grid map is fixed a point is loaded with, and loads with and adaptability target parameter according to the map setpoint information calculated, and judges map whether information overload;
If judge fixed point thematic symbol information overload, then utilize point set abbreviation algorithm, it is comprehensive that the anchor point corresponding to current fixed-point thematic symbol carries out point group abbreviation; If a point group abbreviation comprehensively fails to reach requirement, then circulation is carried out repeatedly, until map fixed point thematic symbol information loads with nonoverload;
When map fixed point thematic symbol information nonoverload, then regulate fixed point thematic symbol size, make to avoid occurring overlapping and gland phenomenon between fixed point thematic symbol;
Calculate and regulate size postfixed point thematic symbol and the crossing situation of geographical base map key element, judge whether to there is fixed point thematic symbol and geographical base map conflict of feature;
If there is conflict, then adjustment is arranged, to avoid described conflict to fixed point thematic symbol.
2. the robotization collocation method of network map fixed point thematic symbol according to claim 1, is characterized in that:
The calculating that thematic symbol information that described network map is fixed a point is loaded with, is calculated by two indices parameter: one, under webpage scope, the fixed point thematic symbol number of unit screen area; Two, the fixed point thematic symbol area percentage of unit screen area.
3. the robotization collocation method of network thematic maps fixed point symbol according to claim 2, is characterized in that: the fixed point thematic symbol number of unit screen area and the fixed point thematic symbol area percentage of unit screen area calculate as follows:
Pt＝Num/Area(Map)*Area(Unit)
Per＝∑Area(Symbol)/Area(Map)
In formula, Pt is the fixed point thematic symbol number of unit screen area, Num is fixed point thematic symbol sum, Area (Map) is screen map area, Area (Unit) is unit area, Per is fixed point thematic symbol area percentage, and Area (Symbol) is single fixed point thematic symbol area.
4. the robotization collocation method of network map fixed point thematic symbol according to claim 1, is characterized in that:
When regulating fixed point thematic symbol size, Voronoi algorithm is adopted to regulate, according to the Voronoi graph region of the corresponding anchor point of each fixed point thematic symbol, regulate described fixed point thematic symbol size, make the size of fixed point thematic symbol be no more than the Voronoi graph region of corresponding anchor point; Meanwhile, thematic symbol size of fixing a point is greater than naked eyes identification size.
5. the robotization collocation method of network map fixed point thematic symbol according to claim 4, is characterized in that, adopts Voronoi algorithm to regulate fixed point thematic symbol size specifically to comprise the following steps:
Build the Voronoi atlas Vn of anchor point point set Pn corresponding to all fixed point thematic symbol;
Calculate in the Voronoi graph region that in Voronoi atlas Vn, each anchor point is corresponding, the maximum inscribed circle diameter being the center of circle with each anchor point, for the borderline Voronoi graph region of network map, calculate the convex closure of its formation crossing with network map border, the maximum inscribed circle diameter being the center of circle with corresponding anchor point in calculating convex closure;
Calculate the maximum inscribed circle diameter ratio of thematic data corresponding to each anchor point and each anchor point, obtain full-size anchor point and the minimum dimension anchor point of described ratio maximal value and minimum value difference correspondence;
Determine the higher value that the smaller value that full-size anchor point correspondence fixed point thematic symbol is of a size of the maximal value of maximum inscribed circle diameter and Web-page screen and is suitable in full-size, minimum dimension anchor point correspondence fixed point thematic symbol are of a size of the minimum value of minimum inscribed circle diameter and Web-page screen and are suitable in minimum dimension;
The size of other anchor point correspondence fixed point thematic symbol is calculated by following formula:
Wherein, Si is the size of i-th anchor point correspondence fixed point thematic symbol, Smin is the size of minimum dimension anchor point correspondence fixed point thematic symbol, Smax is the size of full-size anchor point correspondence fixed point thematic symbol, Tmax is the maximal value of maximum inscribed circle diameter, Tmin is the minimum value of maximum inscribed circle diameter, and Ti is the maximum inscribed circle diameter that i-th anchor point is corresponding.
6. the robotization collocation method of network map according to claim 1 fixed point thematic symbol, is characterized in that, describedly arranges adjustment to thematic symbol and specifically regulates according to the priority rule between thematic symbol and network map base features.
7. the robotization collocation method of the network map fixed point thematic symbol according to claim 1 or 6, it is characterized in that, described network map base features comprises basic factors, vector symbol and plotting symbol.
8. the robotization collocation method of network map fixed point thematic symbol according to claim 7, it is characterized in that, the priority rule between described fixed point thematic symbol and network map base features is as follows:
Basic factors > vector symbol > fixed point thematic symbol > marks and draws symbol.
9. the robotization collocation method of network map according to claim 7 fixed point thematic symbol, is characterized in that, described to fixed point thematic symbol arrange regulate specific as follows:
If map base features priority is higher than fixed point thematic symbol, and key element hides by fixed point thematic symbol completely, then do not show this fixed point thematic symbol;
If fixed point thematic symbol lower than fixed point thematic symbol, is then arranged to transparent by map base features priority, ensure that base features is visible;
If map base features and surrounding geographic element do not form geometry, then key element is positioned on fixed point thematic symbol.
10. a robotization inking device for network map fixed point thematic symbol, is characterized in that, comprising:
Load computing module, thematic symbol information of fixing a point on computational grid map is loaded with, and loads with and adaptability target parameter according to the map fixed point thematic symbol information calculated, and judges map whether information overload;
Point set abbreviation module, its fruit judges map fixed point thematic symbol information overload, then it utilizes point set abbreviation algorithm, and it is comprehensive that the anchor point corresponding to current fixed-point thematic symbol carries out point group abbreviation; If a point group abbreviation comprehensively fails to reach requirement, then circulation is carried out repeatedly, until map fixed point thematic symbol information loads with nonoverload;
Size adjustment module, when map fixed point thematic symbol information nonoverload, then it regulates fixed point thematic symbol size, makes to avoid occurring overlapping and gland phenomenon between fixed point thematic symbol, meanwhile, amplification process is carried out for the fixed point thematic symbol being less than naked eyes identification size;
Conflict judge module, regulating size postfixed point thematic symbol and the crossing situation of geographical base map key element for calculating, judging whether to there is fixed point thematic symbol and geographical base map conflict of feature;
Arrange adjustment module, if there is conflict, then it arranges adjustment, to avoid described conflict to fixed point thematic symbol.
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| CN115185435A (en) * | 2021-09-30 | 2022-10-14 | 红科网安(武汉)科技有限公司 | Method for controlling display of key drawing plotting special elements |
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