SU807354A1 - Cartographic image reading-out device - Google Patents

Description

one

The invention relates to automation and computing and can be used to convert contour contours of a cartographic image into digital form.

Arrangements for reading map images are known, comprising a beam-splitting head, a scanning unit, a control unit and a coordinate determination unit 1.

The main disadvantage of the devices is associated with the laboriousness of making special intermediate carriers, where the signs and absolute values of heights (Z coordinates) of the isolines are given by a single-color or multi-color code. In addition, the need to use color separation photo heads complicates the automatic digital data acquisition device and does not allow to obtain an acceptable isoline digital performance.

The closest in technical essence to the present invention is a device for reading .cartographic images, comprising: a tablet; a coordinate movement mechanism associated with a carriage on which a reading element is mounted, connected to a coordinate determination unit, whose information outputs are connected to the corresponding inputs of the block. exchange of information.

The introduction of information on the height position of the points of the isolines is made by the operator in the process of digitizing manually through the control panel 2.

The disadvantages of such a semi-automatic device are

0 that tedious manual operations lead to an increase in time spent on the process of digitizing the isolines of a cartographic relief image, a phenomenon; operator’s subjective errors and, as a result, the introduction of mandatory time-consuming additional monitoring of digital results, as well as insufficient device performance, due to

This is because the data on the height of the isolines are entered non-simultaneously with the two-dimensional coordinates of the position of the point on the cartographic image.

 Uejfb of the invention - improving the speed of the device.

This goal is achieved by the fact that the device contains a block for modeling the height of the relief, for example, made in the form of a dielectric

Claims (2)

0 plates with electrically conducting tracks printed on it, a block for setting heights of isolines, the outputs of which are connected to electrically conductive paths of a block for modeling a height of a relief, and an additional carriage connected to the mechanism on which the additional element / reader is stopped, made in the form of a contact a sensor connected with the relief height modeling unit and connected to one of the inputs of the coordinate determination unit and to the control input of the information exchange unit. A terrain height modeling unit can be performed, for example, in the form of a set of voltage dividers connected to 1 sol of one level. FIG. 1 shows a structural diagram of the device in FIG. 2 is a kinematic diagram of the mechanism of longitudinal and transverse movement, interconnected two carriages with sensors of the coordinates of both plates. The device contains a coordinate tablet 1 X and Y axes, a coordinate determination unit 2, a Z axis coordinate tablet 3 with a relief height modeling block 4, made, for example, in the form of a flat dielectric plate 5, with electrically conductive tracks b on it, task block 7 heights of isolines, the outlets 8 of which are connected to isolines of one level, the coordinate mechanism 9 of the longitudinal and transverse movement, the carriage 10 with the X and Y coordinate reading element 11 fixed on it, the auxiliary carriage 12 with the electric fixed on it A contact sensor 13 of the Z coordinate, an information exchange unit 14, one input of which is connected to the output of the electrical contact sensor 13 of the Z coordinate, and the other to the output of the coordinate determination unit 2. The device works as follows. Before the start of digital automatics, the heights of the isolines are encoded using the block 7, which defines the heights of the isolines. For this, each conductor track 6 or a group of equal lines of height through its conductors marked with code numbers in accordance with the heights of the isolines are connected to the corresponding outputs 8 of the block 7 for specifying the heights of the isolines. Each output 8 of block 7 with a code number corresponds to a certain electrical potential created, for example; a set of voltage dividers. Thereafter, the relief height modeling unit 4 is locked (on the coordinate plate 3 of the Z axis. Using the manual control of the mechanism 9 for the longitudinal and transverse movement of the carriages. The carriage 12 with the electrical Z sensor 13 attached to it is moved Since the carriage 10 / with the X and Y coordinate reading element 11 fixed on it also moves simultaneously with the carriage 9 (Figures 1 and 2), it is also installed at the starting point on the coordinate plate 1 of the X and Y axes. Exodus A zero point is used to zero the coordinate counters, coordinate determination unit 2. Next, the whole process of digitizing isolines with the X, Y and 2 coordinates is performed automatically. After switching on, the mechanism 9 for the longitudinal and transverse movement of the carriages starts, performing a reciprocating movement along the Y axis and discrete ( with a given step; moving along the X axis, interconnected two carriages, with an element 11 of reading the coordinates X and Y fixed on the carriage 10 and with an electrical contact fixed on the carriage 12 Atchik 13 coordinates Z across plate 5. When an electrical contact sensor 13 contacts a conductor track b, an electrical signal is read about the elevation of the point of the isoline and, simultaneously, electrical signals from the X-and Y-axis tablet 1. Electrical signals enter the input of unit 2 determining the coordinates where they are digitized. From the output of block 2, digital data on the three coordinates X-, Y and Z are successively fed to one of the inputs of the information exchange unit 14, to another input of which a control signal is received from the sensor 13, ensuring their passage to the output of the device. The process of reading the coordinate 2 and issuing the three coordinates X, Y and Z is repeated for each point of the cartographic image in which the electrical contact sensor 13 touched the Z coordinate with the conductive track 6. During the movement of the carriages 10 and 1.2 with the sensors on the digital data storage (not shown) connected to the output of the digital device, an array of digital data of the three coordinates X, Y and Z of discrete points belonging only to the isolates of the cartographic image of the relief is formed. The feasibility study of the advantages of the proposed device can be carried out by digitizing the conditional map sheet in the form of a preparatory dissected original with a cartographic image of the relief, for example, 1 m to 1 m. The speeds at which modern drawing machines operate with an electro-mechanical drive, and when the displacement step along the X axis is 1 mm, the digital data array on the drive connected to the output of the device is obtained in 35 minutes regardless of the complexity of the terrain. When using a known device, this work requires up to 30 hours (depending on the complexity of the relief of the time of direct digitization. Formula of the invention. A device for reading cartographic images containing a tablet, a coordinate displacement mechanism mounted on the tablet and connected to the carriage on which the read element, connected to the unit for determining the coordination of the information outputs of which are connected to the corresponding inputs of the information exchange unit, which is the purpose of It increases speed, it contains a terrain height modeling unit, for example, in the form of a dielectric plate with electrically conductive paths applied to it, an isoline heights unit, the outputs of which are connected to electrically conductive paths of the relief height modeling unit, and an additional carriage, which has an additional readout element, made in the form of a contact sensor associated with a relief height modeling unit and connected to one of the inputs of the coordinate determination unit dinat and to the control input of the information exchange unit. Sources of information taken into account in the examination 1. US patent number 3555546, NCI, 343-5, 1971. 2. The encoder graphic information EM-709. Technical specification Ya2M1.142.016TO. Minsk, 1974 (prototype).