At this step it is required to enter a name of report file on sewing. One can choose the file which already exists. In this case it is required to select one of the two modes: append – new data will be written to the end of the report file or overwrite – the data existing in the file will be removed and new data will be written instead of it.
It is recommended always to create a report file to be able to estimate sewing results.
SEW extension is usually used for such files.
A report consists of several parts each of which describes results of sewing features of one type in map layer. Each part consists of three sections: header section (figure 75-3), a list of features not sewed due to lost of border simplicity (figure 75-4) and section with totals (figure 75-5). Apart from that there is the section with totals for the whole file, it contains total data by all types of map features for which sewing was performed.
Map : Taganrog
Layer : Territory
Feature type : Building
Sewing region : vertical
X-coordinate of the sewing region start : 280.0
Y-coordinate of the sewing region start : 100.0
X-coordinate of the sewing region end : 280.0
Y-coordinate of the sewing region end : 400.0
Sewing region width : 0.5
Figure 75-3. Section of report header
-------Simplicity loss of the boundary-------
Left feature: 132
Outer boundary
1 280.25 275.08991162
2 274.88412116 273.72400881
…
Right feature: 133
Outer boundary
1 280.25 258.54745394
2 275.45920453 257.29527797
…
Figure 75-4. List of non-sewed features
Total selected features : 64
Total features out of sewing region : 36
Total features completely in sewing region : 0
Total features without points/intervals for sewing : 4
Total features with ambiguous points/intervals for sewing: 1
Total features-candidates for sewing : 23
Total features with a simplicity fault by sewing : 9
Total possible sewings : 19/22
Total sewed features : 2
Figure 75-5. Report on section with totals report section
In the header names of a map, layer, layer feature type and sewing parameters are specified.
The list of non-sewed features includes pairs of area features which form a feature with self-intersecting border after sewing. Such pairs are not sewed.
Section with totals contains the following information:
“Total selected features” – number of features preliminarily selected by the system. Features located close to sewing region fall into preliminary selection.
then the system thoroughly goes through preliminary selection and rejects the features which do not fall into sewing region. Value of “Total features out of sewing region” shows how many features were rejected at this step;
then the system rejects the features which entirely fall in sewing region – value “Total features completely in sewing region”'
at next step the system rejects line features which do not have points of sewing and area features which do not have intervals of sewing – “Total features without points/intervals for sewing”. For example, a line intersects sewing region, but does not begin or end in the sewing region – lines 1, 2 and 3, or an area feature intersects sewing region but by the side of sewing region corresponding to sewing width, – 4, or projection of area feature boundary falling into sewing region on axis of the region is less than half the sewing width – 5 (figure 75-6);
features which intervals or points of sewing fall out of sewing region are also rejected – “Total features with ambiguous points/intervals for sewing” (figure 75-7);
pairs of features which lose simplicity after sewing are not sewed; the value “Total features with a simplicity fault by sewing” is the number of such pairs;
number of various sewings to the left / to the right (for vertical sewing) or at the top / at the bottom (for horizontal one) is given in the line “Total possible sewings”;
the line “Total sewed features” contains the number of features which were formed anew after performing sewing.
Figure 75-6. Features without points/intervals of sewing
Figure 75-7. Features with inadmissible points or intervals of sewing
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