How to Overlay/add shapefiles that don't have the same number of polygons

MarianaReyes

Hello everyone I'm having a hard time trying to overlay my 3 shapefiles. for instand what I'm trying to look at are the LULC changes. For instance I was hoping to be able to do this

Raw data:

Shapefile 1 - Year 2007

OID	TYPE	ID
1	Forest	100
2	Shrub	200
3	Grass	300
4	Mudflat	400

 

Shapefile 2 - Year 2018

OID	TYPE	ID
1	Shrub	020
2	Forest	010
3	Mudflat	040
4	Mudflat	040

 

Shapefile 2 - Year 2021

OID	TYPE	ID
1	Forest	001
2	Shrub	002
3	Grass	003
4	Grass	003

 

What I want my Shapefile to look like: 

OID	TYPE	ID
1	Forest -Shrub- Forest	121
2	Shrub -Forest-Shrub	212
3	Grass-Mudflat-Grass	343
4	Mudflat-Mudflat-Grass	443

 

I cannot make this poutcome because the size and and number polygons in each shapefile are different. I want to add the ID number to see th changes. I already did the raster to check the rate of change using this raster equation:  ("current raster"-1)*9 + "previous raster" -1 but its hard to put all three togethger to to see which parts changed (in terms of visualization. Thank you in advanced

Screenshot 2022-12-21 154843.png

Screenshot 2022-12-21 154925.png

Screenshot 2022-12-21 154912.png

TinaBrewington_0-1724796700512.png

TinaBrewington_1-1724796700524.png

AnthonyLatini_0-1724795240602.png

MarianaReyes

Hello everyone I'm having a hard time trying to overlay my 3 shapefiles. for instand what I'm trying to look at are the LULC changes. For instance I was hoping to be able to do this

Raw data:

Shapefile 1 - Year 2007

OID	TYPE	ID
1	Forest	100
2	Shrub	200
3	Grass	300
4	Mudflat	400

 

Shapefile 2 - Year 2018

OID	TYPE	ID
1	Shrub	020
2	Forest	010
3	Mudflat	040
4	Mudflat	040

 

Shapefile 2 - Year 2021

OID	TYPE	ID
1	Forest	001
2	Shrub	002
3	Grass	003
4	Grass	003

 

What I want my Shapefile to look like: 

OID	TYPE	ID
1	Forest -Shrub- Forest	121
2	Shrub -Forest-Shrub	212
3	Grass-Mudflat-Grass	343
4	Mudflat-Mudflat-Grass	443

 

I cannot make this poutcome because the size and and number polygons in each shapefile are different. I want to add the ID number to see th changes. I already did the raster to check the rate of change using this raster equation:  ("current raster"-1)*9 + "previous raster" -1 but its hard to put all three togethger to to see which parts changed (in terms of visualization. Thank you in advanced

Screenshot 2022-12-21 154843.png

Screenshot 2022-12-21 154912.png

Screenshot 2022-12-21 154925.png