Use create fishnet to generate grid in ArcGIS

If the width and height of a cell are defined as 0, you must specify the number of rows and columns, and the range of the grid diagonally diagonal grid can be entered manually, or you can reference existing data as a template. If you enter a template, the start and y-axis coordinates of the grid are automatically populated, however, you still need to enter the number of rows and columns if the row number is specified as 0, you must define the coordinates of the grid diagonally if the width and height of the cell are defined as 0, then the program automatically calculates the size of the cell based on the number of rows and the diagonal coordinates. If you define the width and height of the cell and enter a row number of 0, you must enter the coordinates of the grid diagonally. The program calculates the number of rows based on the defined cell size. So that the grid can fill the entire area without exceeding the defined range unit Gocquan and the units of the generated feature class are the same, for example, 0.5 units are geographical coordinates of half degrees, but also UTM 0.5 meters, by default, will automatically generate labels The label is a point of the file, and the position of each point is the center of its corresponding cell, this file will be placed in the same path as the target file with the filename of the target file plus the suffix "_labels", but I didn't think of anything to do with it. If you want to generate a polygon file from a generated line file, You must also use the feature to Polygon tool

The role of fishnet is to generate grid, accurately speaking, it only generates longitude, so fishnet's name is still very accurate. There are many parameters to fishnet, mainly the following:

range, including the x axis and the y axis of the minimum and maximum, four number, can also use the lower left corner and the upper right corner of the coordinates to express, in fact, this is a look, there is no essential difference. So the word defines the range of a rectangle, fishnet will automatically populate with cells, but he will not exceed the size of the range cell, the number of rows and columns on the cell, the two pairs of arguments are actually conflicting, and if the size of the cell is filled, then the number of rows should be filled with 0. means to fishnet oneself by calculation;

To cover the grid on the water stream, can directly use the range of the water system, then if the unit aligning larger, then there must be a lot of water systems can not be covered by grid, but if the cell is smaller, can not be covered by the grid of the water system and very few, this on the calculation of the dimensions should not be affected.

(ESRI online Help on Fishnet's exposition)