Cached　materialized　view　can　provide　a　lot　of　performance　benefits,　but　the　materialized　view　is　not　consistent　with　the　data　source　any　more　when　updates　happen　in　data　source.　Extensive　studies　on　incremental　maintenance　of　materialized　views　have　proved　that　maintaining　materialized　views　incrementally　can　optimize　the　query　and　bring　better　performance　than　that　of　view　recomputation.　This　paper　proposes　an　approach　to　implement　incremental　maintenance　of　materialized　SVG　view　based　on　the　theory　of　incremental　computation.　An　incremental　maintenance　program　consists　of　view　update　instructions　that　can　be　generated　by　a　Web-based　geographic　information　query　engine　with　incremental　maintenance　capability.　This　program　can　be　executed　on　the　cached　SVG　view　to　obtain　a　consistent　materialized　SVG　view.　XPath　is　used　as　the　view　specification　language　for　SVG　view　at　client　side.　The　main　points　of　this　paper　are:　(1)　an　algorithm　SVG-IMA　that　can　generate　SVG　view　update　instruction　according　to　a　materialized　SVG　view　specification　and　an　update　in　spatial　data　source;　(2)　a　SVG　materialized　view　consistency　maintenance　system　framework　in　a　web　environment　according　to　a　remote　spatial.　data　source.　Experiments　have　shown　that　this　approach　outperforms　view　recomputation.