How to reclassify a shapefile using ArcGIS
So I have a shapefile consisting of 1000 polygon records. I would want to reclassify one field "Value" into a new blank field named "New Value". As an example:
record = 1; value = 25.6
record = 2; value = 35.4
record = 3; value = 14.1
record = 4; value = 44.6
record = 5; value = 8.7
record = 6; value = 2.1
record = 7; value = 10.4
record = 8; value = 18.3
record = 9; value = 30.9
record = 10; value = 28.5
I want all records with records from 0 to 10 as new field with label "rice". Then 11 to 15 as "wheat", 15 to 25 as "corn", and the remaining unclassified records as "others". How would I do this with ArcGIS? Do I use the Field Calculator for this? I appreciate any help.
arcgis-desktop shapefile vector
asked 2 hours ago
GISnewGISnew
826
add a comment |
So I have a shapefile consisting of 1000 polygon records. I would want to reclassify one field "Value" into a new blank field named "New Value". As an example:
record = 1; value = 25.6
record = 2; value = 35.4
record = 3; value = 14.1
record = 4; value = 44.6
record = 5; value = 8.7
record = 6; value = 2.1
record = 7; value = 10.4
record = 8; value = 18.3
record = 9; value = 30.9
record = 10; value = 28.5
I want all records with records from 0 to 10 as new field with label "rice". Then 11 to 15 as "wheat", 15 to 25 as "corn", and the remaining unclassified records as "others". How would I do this with ArcGIS? Do I use the Field Calculator for this? I appreciate any help.
arcgis-desktop shapefile vector
asked 2 hours ago
GISnewGISnew
826
How familiar are you with Python? Are you comfortable with select by attributes? What have you tried already, and where are you getting stuck?
– smiller
2 hours ago
@smiller I have used select by attributes before. But I am wondering if it could be done in one step, or should it needs many steps to get what I want. Thanks.
– GISnew
2 hours ago
add a comment |
So I have a shapefile consisting of 1000 polygon records. I would want to reclassify one field "Value" into a new blank field named "New Value". As an example:
record = 1; value = 25.6
record = 2; value = 35.4
record = 3; value = 14.1
record = 4; value = 44.6
record = 5; value = 8.7
record = 6; value = 2.1
record = 7; value = 10.4
record = 8; value = 18.3
record = 9; value = 30.9
record = 10; value = 28.5
I want all records with records from 0 to 10 as new field with label "rice". Then 11 to 15 as "wheat", 15 to 25 as "corn", and the remaining unclassified records as "others". How would I do this with ArcGIS? Do I use the Field Calculator for this? I appreciate any help.
arcgis-desktop shapefile vector
asked 2 hours ago
GISnewGISnew
826
So I have a shapefile consisting of 1000 polygon records. I would want to reclassify one field "Value" into a new blank field named "New Value". As an example:
record = 1; value = 25.6
record = 2; value = 35.4
record = 3; value = 14.1
record = 4; value = 44.6
record = 5; value = 8.7
record = 6; value = 2.1
record = 7; value = 10.4
record = 8; value = 18.3
record = 9; value = 30.9
record = 10; value = 28.5
I want all records with records from 0 to 10 as new field with label "rice". Then 11 to 15 as "wheat", 15 to 25 as "corn", and the remaining unclassified records as "others". How would I do this with ArcGIS? Do I use the Field Calculator for this? I appreciate any help.
arcgis-desktop shapefile vector
arcgis-desktop shapefile vector
asked 2 hours ago
GISnewGISnew
826
asked 2 hours ago
GISnewGISnew
826
asked 2 hours ago
GISnewGISnew
826
asked 2 hours ago
GISnewGISnew
826
asked 2 hours ago
GISnewGISnew
826
826
How familiar are you with Python? Are you comfortable with select by attributes? What have you tried already, and where are you getting stuck?
– smiller
2 hours ago
@smiller I have used select by attributes before. But I am wondering if it could be done in one step, or should it needs many steps to get what I want. Thanks.
– GISnew
2 hours ago
add a comment |
How familiar are you with Python? Are you comfortable with select by attributes? What have you tried already, and where are you getting stuck?
– smiller
2 hours ago
@smiller I have used select by attributes before. But I am wondering if it could be done in one step, or should it needs many steps to get what I want. Thanks.
– GISnew
2 hours ago
How familiar are you with Python? Are you comfortable with select by attributes? What have you tried already, and where are you getting stuck?
– smiller
2 hours ago
How familiar are you with Python? Are you comfortable with select by attributes? What have you tried already, and where are you getting stuck?
– smiller
2 hours ago
@smiller I have used select by attributes before. But I am wondering if it could be done in one step, or should it needs many steps to get what I want. Thanks.
– GISnew
2 hours ago
@smiller I have used select by attributes before. But I am wondering if it could be done in one step, or should it needs many steps to get what I want. Thanks.
– GISnew
2 hours ago
add a comment |
1 Answer
1
active
oldest
votes
You will need to build an expression like the one in this question/answer. You need an if, elif, elif, else statement.
Set your language to Python in the Field Calculator.
Put this in the code block:
def rc(f):
if 10 >= f >= 0:
return "rice"
elif 15 >= f >= 11:
return "wheat"
elif 25 >= f >= 16:
return "corn"
else:
return "others"
put this in the expression box:
rc(ValueField)
Value field will be the field that holds the values you want to reclassify.
answered 2 hours ago
jbalkjbalk
4,249728
I'm gonna try this. I'd let you know how it goes. Thank you.
– GISnew
2 hours ago
It worked. Thanks @jbalk. I appreciate the quick help.
– GISnew
2 hours ago
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You will need to build an expression like the one in this question/answer. You need an if, elif, elif, else statement.
Set your language to Python in the Field Calculator.
Put this in the code block:
def rc(f):
if 10 >= f >= 0:
return "rice"
elif 15 >= f >= 11:
return "wheat"
elif 25 >= f >= 16:
return "corn"
else:
return "others"
put this in the expression box:
rc(ValueField)
Value field will be the field that holds the values you want to reclassify.
answered 2 hours ago
jbalkjbalk
4,249728
I'm gonna try this. I'd let you know how it goes. Thank you.
– GISnew
2 hours ago
It worked. Thanks @jbalk. I appreciate the quick help.
– GISnew
2 hours ago
add a comment |
You will need to build an expression like the one in this question/answer. You need an if, elif, elif, else statement.
Set your language to Python in the Field Calculator.
Put this in the code block:
def rc(f):
if 10 >= f >= 0:
return "rice"
elif 15 >= f >= 11:
return "wheat"
elif 25 >= f >= 16:
return "corn"
else:
return "others"
put this in the expression box:
rc(ValueField)
Value field will be the field that holds the values you want to reclassify.
answered 2 hours ago
jbalkjbalk
4,249728
I'm gonna try this. I'd let you know how it goes. Thank you.
– GISnew
2 hours ago
It worked. Thanks @jbalk. I appreciate the quick help.
– GISnew
2 hours ago
add a comment |
You will need to build an expression like the one in this question/answer. You need an if, elif, elif, else statement.
Set your language to Python in the Field Calculator.
Put this in the code block:
def rc(f):
if 10 >= f >= 0:
return "rice"
elif 15 >= f >= 11:
return "wheat"
elif 25 >= f >= 16:
return "corn"
else:
return "others"
put this in the expression box:
rc(ValueField)
Value field will be the field that holds the values you want to reclassify.
answered 2 hours ago
jbalkjbalk
4,249728
You will need to build an expression like the one in this question/answer. You need an if, elif, elif, else statement.
Set your language to Python in the Field Calculator.
Put this in the code block:
def rc(f):
if 10 >= f >= 0:
return "rice"
elif 15 >= f >= 11:
return "wheat"
elif 25 >= f >= 16:
return "corn"
else:
return "others"
put this in the expression box:
rc(ValueField)
Value field will be the field that holds the values you want to reclassify.
answered 2 hours ago
jbalkjbalk
4,249728
edited 2 hours ago
answered 2 hours ago
jbalkjbalk
4,249728
answered 2 hours ago
jbalkjbalk
4,249728
answered 2 hours ago
jbalkjbalk
4,249728
4,249728
I'm gonna try this. I'd let you know how it goes. Thank you.
– GISnew
2 hours ago
It worked. Thanks @jbalk. I appreciate the quick help.
– GISnew
2 hours ago
add a comment |
I'm gonna try this. I'd let you know how it goes. Thank you.
– GISnew
2 hours ago
It worked. Thanks @jbalk. I appreciate the quick help.
– GISnew
2 hours ago
I'm gonna try this. I'd let you know how it goes. Thank you.
– GISnew
2 hours ago
I'm gonna try this. I'd let you know how it goes. Thank you.
– GISnew
2 hours ago
It worked. Thanks @jbalk. I appreciate the quick help.
– GISnew
2 hours ago
It worked. Thanks @jbalk. I appreciate the quick help.
– GISnew
2 hours ago
add a comment |
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How familiar are you with Python? Are you comfortable with select by attributes? What have you tried already, and where are you getting stuck?
– smiller
2 hours ago
@smiller I have used select by attributes before. But I am wondering if it could be done in one step, or should it needs many steps to get what I want. Thanks.
– GISnew
2 hours ago